The report is in on the first official contributions of the 1988 presidential campaign. Former Delaware governor Pierre S. du Pont IV, the only 1988 contender to set up a formal campaign committee, raised $168,315 in the committee's first 28 days, according to documents filed with the Federal Election Commission.

The documents also show that it pays to be a du Pont. The committee collected $29,350 from 43 people named du Pont, not including the candidate, who chipped in $5,000. Just over half of the contributors -- 140 of 269 -- gave addresses in Delaware, where du Pont was governor from 1977 to 1985.

Since June 3, when he established the Pete du Pont for President Committee, du Pont has spent $34,786.78 -- much of it to set up the campaign office. Signatures for Stevenson

Finally, something has gone right for Adlai E. Stevenson III in his run for governor of Illinois. He has surpassed the 25,000 signatures necessary to put his Solidarity Party slate on the Nov. 4 ballot. Campaign officials, who are taking no chances, said the petition drive will continue until the Aug. 4 deadline. Defending Divine Endorsements

New Right leader Paul Weyrich recently announced the formation of the American Election Commission, a group to protect the First Amendment right of candidates "to express their religious views, including belief in some form of Divine endorsement of their candidacy."

South Dakota Gov. William J. Janklow (R), who chairs the group, said it will investigate cases in which candidates are attacked for statements about their religious beliefs. A spokesman said the commission could cite no candidate who has sought such help.

The commission's main target appears to be People for the American Way's election project, which monitors "the use of religious intolerance as a campaign tactic," including claims that candidacies or positions are endorsed by God.

"People for the American Way suggests that some persons shouldn't suggest that God spoke to them and endorsed their candidacy," Janklow said. "Frankly, if I heard somebody say that, I might not believe it. But I don't question their right to say it."

Janklow, who lost his June primary challenge for the Senate nomination, said that God never told him to run, adding, "Maybe that's why I lost the last time." Polls

In the Florida Senate race, a poll conducted July 12-14 for several news organizations shows Gov. Bob Graham (D) with a 49 percent to 38 percent lead over Sen. Paula Hawkins (R), who is getting a visit today from President Reagan. Graham's lead is nearly the same as in March, even though Hawkins had been sidelined most of April and May by health problems.

In the Alabama Senate race, a Birmingham News/Capstone poll taken in late June shows Sen. Jeremiah Denton (R) leading Rep. Richard C. Shelby (D) 46 percent to 42 percent. In January, Denton led 55 percent to 29 percent.

In Oregon, a June poll for the Oregonian shows Sen. Bob Packwood (R) maintaining a lead over challenger Rep. James Weaver (D), 60 percent to 30 percent.

In the governor's race, the poll shows Secretary of State Norma Paulus (R) with a 46 percent to 43 percent lead over Neil Goldschmidt (D), who was a secretary of transportation in the Carter administration. Paulus had a 7-point lead in March