MANCHESTER, N.H., FEB. 12 -- With polls showing Vice President Bush still holding on to a narrow lead over Sen. Robert J. Dole (R-Kan.), former secretary of state Alexander M. Haig Jr. threw his minuscule support to Dole today as he formally exited the Republican presidential race.

In what the same polls show is an extremely tight three-man race for third place in the GOP field, Rep. Jack Kemp (R-N.Y.) assailed former television evangelist Pat Robertson today. He accused the Robertson campaign of "foul play" and "deliberate distortion" for distributing thousands of fliers implying that Kemp is pro-pornography. The leaflets went to churches throughout Iowa on the eve of last Monday's caucuses. Former Delaware governor Pierre S. (Pete) du Pont IV is vying with Kemp and Robertson for third place, the polls show.

Haig's endorsement of Dole and the first direct attack on Robertson by any of his rivals dominated events on a day when a snowstorm swept across New England, shutting down almost all other campaign activity -- except media-conscious Bush's trudge through the snow -- by the remaining five Republican and seven Democratic candidates.

Tracking polls by The Washington Post and ABC News over the past three days showed virtually no change in the Democratic race, where Massachusetts Gov. Michael S. Dukakis holds a 2-to-1 advantage over his closest rivals; Rep. Richard A. Gephardt (D-Mo.) and Sen. Paul Simon (D-Ill.) are locked in a close battle for second place.

The temperature of the Democratic race rose tonight after a Democratic dinner in Concord when Gephardt held an impromptu news conference to attack Simon's television commercials criticizing the inconsistency of Gephardt's voting record.

"Enough is enough," Gephardt said, charging that the Simon commercials "impugn my character and integrity. I asked Sen. Simon to take those ads off television. If he doesn't, he ought to take off the bow tie, because he's just another politician."

On the Republican side, the Post-ABC tracking poll showed Bush leading Dole, 32 percent to 27 percent, and suggested that Dole's drive to overtake Bush here has stalled.

Moreover, two out of five of the voters surveyed said they are not strong supporters of their preferred candidate -- a portrait of an electorate that could tilt in the next few days to either of the GOP front-runners.

Bush appears to have a firm base here that has not deserted him despite his third-place finish in the Iowa caucuses, which Dole easily won. Two-thirds of Bush supporters in the Post-ABC poll described their commitment as strong, while only half of Dole's supporters said their support is firm.

Bush's strongest support is among men and conservatives, according to the poll. Dole leads among moderates.

The poll showed Robertson locked in a three-way race for third place, with him and Kemp at 12 percent and du Pont at 10 percent. Haig had 2 percent.

Since his second-place finish in Iowa, Robertson has doubled his support here, du Pont has also gained and Kemp has remained steady, according to the poll.

The storm turned the Kemp-Robertson feud into a long-distance duel. Kemp made his charges at the Conservative Political Action Conference in Washington, where he was stranded. Robertson had planned to attend the meeting, but he was stuck in New Hampshire.

"I can't insist that all candidates abide by the 11th commandment," Kemp told 500 conservative activists, a reference to a supposed rule against infighting among GOP candidates. "But all of us should abide by the Ninth: 'Thou shalt not bear false witness.' "

Kemp also criticized Robertson for a television commercial that invoked The Wall Street Journal as the source of an economic forecast that holds that Kemp's policies would lead to a recession and Robertson's policies to prosperity.

The newspaper has since noted editorially that its report of the private forecast was meant to be an off-beat item and criticized Robertson for "gratuitously dragging our name to lend credibility to an outfit few have ever heard of."

Robertson spokeswoman Connie Snapp said the television ad is no longer running. She said two fliers were distributed in Iowa. The first, which the Robertson campaign paid for, was a copy of a survey by the Presidential Biblical Scorecard that showed Kemp with a pro-pornography rating, she said.

Snapp said the Robertson campaign had just learned of allegations that the second flier -- which she described as a distorted summary of the Biblical Scorecard -- may have been paid for by its Iowa coordinator, Dan Scalf. "If we find he was responsible for the renegade piece, he will be disciplined or terminated," she said.

Kemp's decision to attack Robertson appeared to be a gamble by a candidate who is out of money and in danger of being eliminated from the race. Like the other Republicans, Kemp has approached Robertson gingerly and courted his evangelical followers. But Kemp and his advisers apparently have concluded that unless his campaign picks up dramatically, he will never get to the southern-dominated March 8 "Super Tuesday" contests.

Haig used his withdrawal announcement here for a final shot at Bush. "Bob Dole is head and shoulders above George Bush," said Haig, who has never tried to conceal his dislike of the vice president. "I just don't think the two men compare, in terms of leadership above all," he added.

Haig's endorsement is unlikely to have much impact, but Dole aides said they hope it will provide an added nudge to his momentum from Iowa and shore up Dole's foreign policy credentials, one area where Bush is perceived as superior.

Bush, forced to cancel his official afternoon appearances because of the snowstorm, made the best of the weather by campaigning in the blizzard. Donning a blue-and-white Dallas Cowboys ski cap, and with his wife, Barbara, at his side, he trudged through the snow for more than an hour, shaking hands with voters who were shoveling out, kissing babies wrapped in snowsuits and throwing snowballs with reporters.

He also drove a snowplow that he and about 50 reporters and cameramen came upon during the walk through a neighborhood of recently constructed Nashua town houses.

Bush seemed in high spirits, insisting the walk go on for more than an hour through sparsely populated roads. He posed often for the television cameras, instructing the snowplow driver how to turn his truck around to get the best angles for "show biz," as Bush put it.

Questioned about Haig's charge that Bush was present but not active in policy considerations, Bush said, "Let the voters determine that." He said he had expressed respect for Haig and said "the good news was that at the same time he made his announcement, the cochairman of his campaign called up and said he's for us."

Before the snow came down heavily, Bush renewed his attack on Dole in a speech to the Southern New Hampshire Association of Commerce and Industry. "My life has been marked by foreign policy experience at the highest levels," he said. "And I believe his has been devoid of that 'hands on' foreign policy experience."

Bush called Dole's proposed across-the-board spending freeze a "gimmick." The vice president said he would support a "freeze on totals" in the budget but wants the option to increase some programs, such as drug enforcement, while cutting others. Bush has not been specific about how he would get to a balanced budget, however.

"The answer is for the president to make decisions and call the shots and take the heat," he said. "That's what a president is there for, to make these decisions wisely for the whole country. The freeze Bob Dole has proposed is simply a decision not to decide."

The Post-ABC tracking poll for Tuesday through Thursday nights showed virtually no movement in the race, with Dukakis at 37 percent, Gephardt and Simon deadlocked at 19 and 17, respectively, and the other four in single digits. Dukakis is particularly strong among women voters, self-described moderates and voters older than 30, but the neighboring governor's support is both deeper and broader than any of his rivals.

At tonight's Democratic dinner in Concord, Gephardt stunned a roomful of New Hampshire Democrats by suddenly claiming the tax-cutter label for himself in his speech. Saying that Dukakis and Simon had criticized him for supporting the 1981 Reagan tax cut, Gephardt said, "I'm here to say I did it." Later, he told reporters that if Dukakis' "State of the State speech becomes next year's State of the Union, Americans will face higher taxes."

New Hampshire Democrats are more accustomed to hearing tax-raiser charges from the Republicans in their state than from their own presidential candidates.

Simon said of Dukakis' statement, "Last week, he was talking about how he had fought the Reagan tax bill."

The Post-ABC polls show Gephardt leading Simon among voters older than 60, while the reverse is true among younger voters. The poll showed little movement among the trailing Democratic candidates. Jesse L. Jackson has 7 percent; Sen. Albert Gore Jr. of Tennessee has 6 percent; former Arizona governor Bruce Babbitt has 4 percent; and former Colorado senator Gary Hart has 3 percent, with 7 percent undecided.

Staff writers David Hoffman and Gwen Ifill, polling director Richard Morin and polling analyst Kenneth E. John contributed to this report.

March 24, 1987: Former secretary of state Alexander M. Haig Jr. launches his campaign for the 1988 Republican presidential nomination, saying, "{I am} throwing my helmet into the ring {to offer} leadership for America." Haig tells reporters, "inside this exterior, militant, turf-conscious, extremely ambitious demeanor is a heart as big as all outdoors."

Aug. 22: Haig sets himself apart from other Republican candidates by saying it is wrong to only blame Democrats for the federal budget deficit. "This deficit is a Republican deficit . . . . We were in the White House. And we had control of the U.S. Senate. And the men involved in this deficit have some questions to answer to the Republican Party . . . . "

Oct. 28: In the first televised Republican presidential debate, Haig attacks the U.S.-Soviet Intermediate-Range Nuclear Forces (INF) Treaty supported by Vice President Bush. Haig says he opposed the treaty, then tells Bush "I never heard a wimp out of you."

Nov. 17: Haig again criticizes the INF Treaty, saying that "as it now stands {it} would be a step in the wrong direction {because} it weakens rather than strengthens deterrence against war."

Dec. 1: Appearing with the other Republican candidates in a televised debate, Haig challenges Bush on the Iran-contra affair, asking "were you in the cockpit or were you on an economy ride at the back of the plane?"

Monday: Haig wins just 364 votes (0 percent) in the Iowa caucuses, trailing far behind the other five Republican candidates.

Yesterday: Haig withdraws from the race and endorses Kansas Sen. Robert J. Dole.