Republican Gov. Jeb Bush held onto Florida and the GOP took historically Democratic Maryland, but both parties were still waiting to learn if either had captured a majority of the country's 50 governorships.
Republicans won at least 24 of Tuesday's 36 gubernatorial races. But four contests remained unresolved Wednesday because of problems including disputed totals and unopened mail-in ballots.
In Alabama, problems with a single county's results threw the entire race into question.
In Oregon, officials said it may take days to count some 500,000 ballots in the nation's only mail-in election. Democrat Ted Kulongoski led Republican Kevin Mannix by fewer than 6,000 votes.
And in Arizona, with nearly all precincts reporting, Attorney General Janet Napolitano led Republican Rep. Matt Salmon by roughly 20,000 votes -- but at least 100,000 votes, including absentee ballots, had yet to be counted. Officials say it could take days.
With those races pending, Democrats controlled 22 governors' seats and Republicans held 24. In Vermont, Democrat Doug Racine conceded Wednesday to Republican Jim Douglas -- but the Legislature must decide the race because neither received more than 50 percent of the vote.
Before Tuesday, the breakdown was 27 Republicans, 21 Democrats and two independents.
In Florida, President Bush's younger brother overcame strong efforts to oust him from the state's highest elected office. But Kathleen Kennedy Townsend, the daughter of Robert F. Kennedy, lost the race for Maryland governor, leaving the state to Republican rule for the first time in more than two decades.
In Illinois, a Republican lost the governor's office for the first time in 25 years, and in California, Democratic Gov. Gray Davis won a close race.
Democrats broke Republican holds on industrial swing states including Illinois, Michigan and Pennsylvania.
Republicans kept New York, Texas, Rhode Island and Massachusetts. They took Democratic-held seats in Alaska, New Hampshire, Georgia and South Carolina.
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