An overwhelming majority of voters are disgusted by the state of American politics, and many harbor doubts that either major-party nominee can unite the country after a historically ugly presidential campaign, according to the final pre-election New York Times/CBS News Poll.

In a grim preview of the discontent that may cloud at least the outset of the next president’s term, Hillary Clinton and Donald J. Trump are seen by a majority of voters as unlikely to bring the country back together after this bitter election season.

With more than eight in 10 voters saying the campaign has left them repulsed rather than excited, the rising toxicity threatens the ultimate victor. Mrs. Clinton, the Democratic candidate, and Mr. Trump, the Republican nominee, are seen as dishonest and viewed unfavorably by a majority of voters.

While her advantage has narrowed since mid-October, Mrs. Clinton still has an edge in the survey because of a commanding advantage among women and nonwhite voters. She has the support of 45 percent of likely voters while Mr. Trump has 42 percent. Gary Johnson, the Libertarian nominee, has slipped to 5 percent, and Jill Stein, the Green Party candidate, is at 4 percent.