In a column for The Wall Street Journal, assistant director of Quinnipiac University Polling Institute Peter A. Brown predicts you’ll be up a while—possibly all night—if you plan to monitor your television or computer Tuesday to see whether voters sweep a wave of Republicans and tea party candidates into power or leave Democrats in control.

There will be early indications, of course, but many races may be too close to call tomorrow night, including what National Journal calls a “barnburner” for the U.S. Senate in Colorado between Democrat Michael Bennet and his Republican challenger, Ken Buck, who has a single point lead in the latest poll. In fact, many expect the race to be possibly the closest in the nation.

Inspiring plenty of debates, innuendo, and money spent on annoying television ads, Colorado’s race could decide which party controls the Senate. And some experts anticipate a result that could be close enough to prompt a recount. “We have a legal team that’s working on election protection and is also working on a recount plan,” state Democratic Party chairwoman Pat Waak tells The Denver Post, which reports that the GOP will also have its own brigade of lawyers and poll watchers on hand.

Meanwhile, the governor’s race has come down to a contest between Denver Mayor John Hickenlooper and former Congressman Tom Tancredo. This weekend, Hickenlooper, a Democrat who is mourning the death of George Hickenlooper, his filmmaker cousin (see entry above), handed responsibility for campaigning to his running mate, Joe Garcia, who appeared in Republican stronghold Colorado Springs, while Tancredo made stops from Pueblo to Fort Collins.