ROSEVILLE, MICH. -- Here among the white working- and lower-middle-class voters who fueled the Reagan revolution, the evidence of bitter discontent with the substance and style of the Bush administration is extensive.

Delcie Rahaim, who works for an automotive fleet company, voted for George Bush in 1988, but now believes that "Bush has deserted the people." A critic of liberal welfare policies that encourage nonwork, Rahaim is looking for a candidate "who cares about working people, middle-class people." This resident of a state that has become a case study for industrial decline says that "for the first time in years, the Democratic Party is looking better."

Margaret and Robert Bewersdorf both voted for Bush in 1988, but lost their jobs when the trucking company she worked for and the heating and cooling contractor he worked for both folded. The Bewersdorfs are in their early sixties and work part time. Margaret Bewersdorf said she has "to send every second pension check to Blue Shield" for medical coverage. "As far as we are concerned, Bush hasn't done the important things, especially the health thing," she said.

Chris Pelletier, a printer, and his wife, Susan, a secretary, both 34, distrusted the Democratic Party throughout the 1980s, worried that its leaders did not get "a dollar for a dollar" and that instead, tax money flowed from Democratic hands into an omnivorous bureaucracy. "Since Reagan, we've been voting Republican," he said. But that will not be the case in 1992:

"There are times when you have to pay attention to things at home, and things at home are really bad. Where I come from {Bay City, north of here}, they are really bad. We have a small auto factory, and it's devastating the town. It shrinks every year. You go in and there are homes for sale for years. We want someone who is for working people, that is what we are looking for, someone who is going to bring it back home."

Here in Macomb County, widely viewed as a virtual hub of Democratic defectors, the wave of support for the Republican Party in presidential elections appears, for the moment, to have crested.

Macomb is a working-class county that in 1960 won attention as the suburban area casting the nation's highest margin of votes for Democrat John F. Kennedy. Since then, the overwhelmingly white electorate has moved steadily toward the GOP, with much of the momentum driven by racial issues: the Detroit riots of 1967, a 1974 federal court order for intercounty busing with Detroit that was overruled by the Supreme Court, constant battles over tax dollars with predominantly black Detroit.

In combination with accelerating decline of the auto industry during the Democratic administration of Jimmy Carter, these forces produced a rebellion against the Democratic Party and 2-1 ratios for Republican presidential candidates. In the mid-1980s, this insurgency briefly threatened Democratic control of local offices, and desperate party leaders brought in pollster Stanley Greenberg, who in 1985 did not have good news. In a study of defectors, he found:

"These white Democratic defectors express a profound distaste for blacks, a sentiment that pervades almost everything they think about government and politics. . . . Blacks constitute the explanation for their vulnerablity and for almost everything else that has gone wrong in their lives; not being black is what constitutes being middle class; not living with blacks is what makes a place a decent place to live."

Twelve years of Republican control of the White House, and a well-articulated conservatism during the Reagan administration, have provided voters here and elsewhere a more ideological, and less emotional, way of expressing their view.

And while there is evidence of anger with the GOP, it is by no means unanimous. Standing on the other side of the political aisle from Rahaim, the Bewersdorfs and the Pelletiers are voters like Jerry Filion, a 43-year-old skilled craftsman and union member at Dodge Truck, and Richard Powers, 64, a retired gas company worker and union member.

"I used to be a Democrat," said Powers. "When did I change? Reagan. . . . Democrats, well, they always want to give too much away. . . . They want me to pay for someone who doesn't want to work, and I don't like that."

Filion said: "I voted for one Democrat, Jimmy Carter in '76. The entire time I was laid off. I don't vote for any Democrats anymore. Politicians are all corrupt, and the Democrats are the most corrupt. And I can't afford to have any more taxes raised. . . . Welfare. That is a lot to do with it. I'm just disgusted with the whole thing."

The themes of taxes and welfare are voiced repeatedly. Lawrence Whiter, 57, a unionized painter and decorator, said: "I haven't voted Democratic since {John F.} Kennedy. . . . They {the Democratic Party} are just a giveaway. They don't want to give the middle class anything, they are for the lower class and giving it away. When my kids needed help going to college, they couldn't get it because I was making just over the cutoff point."

This split in the Macomb County electorate was apparent in interviews with more than 30 voters and is reinforced by more formal studies.

One survey of Michigan voters found that discontent with the Bush administration is higher than the state average among the roughly 12 percent to 14 percent of voters who are "Bush Democrats" -- people who identify with Democratic principles but who voted for Bush. Robert Kahle, senior research analyst at the Center for Urban Studies at Wayne State University, also found in the survey that in Michigan, where plant closings have become the order of the day, discontent is much higher than in neighboring states.

Kahle found that half or more of the Bush Democrats plan to vote Democratic in November. "If the economy stays as it is, they are definitely going to look for an alternative," Kahle said.

Greenberg, who is now Arkanas Gov. Bill Clinton's pollster, said over the weekend that after talking with and studying Macomb County voters for nearly a decade, "I think they felt pushed out of the Democratic Party and attracted to Ronald Reagan {in the 1980s}. Now, I think Bush is pushing them out of the Republican Party, and the question in this election is whether there is going to be a pull from the Democratic side."

Paul Conn, a Democratic consultant who has been conducting focus groups in Macomb County for state party leaders, said that after conducting three such gatherings last fall, he met with Democrats and told them: "The bad news is the voters {in Macomb} don't like you. The good news is they don't like anyone any more."

Among a substantial number of voters, Conn said, there is the belief that "Bush has no understanding of their problems. He is removed. All the anti-establishment feelings that they never displaced onto Ronald Reagan, they have displaced onto Bush."

In what may, however, be the clearest danger sign for Bush as he struggles to restore support among Reagan-Bush Democrats, Macomb County's quintessential Democratic defector, state Sen. Gilbert DiNello (D), plans to vote for the Democratic nominee for the first time in 16 years.

DiNello, a renegade conservative who has repeatedly infuriated fellow Democrats by publicly appearing with and endorsing Reagan and Bush in the past, said: "I am very disenchanted with George Bush. . . . I think George Bush is in hot water, and the voters here in this county, they are a little fed up with him."