All eyes on Montana, where the Senate race may also be headed for a recount, as Democrat Jon Tester holds on to a 1,700 vote lead as of 10:25 a.m. EST. According to Mary Clare Jalonick's AP report in the Bozeman Daily Chronicle:

Burns, a three-term incumbent, and Tester, an organic grain farmer from Big Sandy, were separated by only about 1,700 votes and .04 percent with 99 percent of precincts reporting. Tester had 194,914 votes and Burns had 193,179 votes. Libertarian Stan Jones had 10,166 votes.

...Vote tallies were still coming in Wednesday morning, more than 10 hours after polls were scheduled to close - a situation caused by equipment glitches, high turnout and a recount in Yellowstone County because of errors there.

A losing candidate can request a recount at his own expense if the margin is within 1/2 of a percent, which would be a margin off roughly 2,000 votes in the Montana U.S. Senate race.

...Tester told CNN that the campaign did not see any irregularities in the voting so far, noting there is record turnout..."We are making sure that every vote that gets cast gets counted," Tester said.

Don't bother checking the Montana Secretary of State's website for updates, since it lags behind the Associated Press totals.