269-269 in the Electoral College.
Republicans run the House, Democrats the Senate.
A split decision in electoral votes gives the White House to Mitt Romney, and Vice President Joe Biden keeps the mansion at the Naval Observatory.
A 269- 269 tie between Romney and President Barack Obama in the Electoral College, the body set up to formally choose the president, would trigger fallback mechanisms that might leave the country in a constitutional and political tempest.
Under the Constitution’s 12th Amendment, a tie would bump the choice to the newly elected Congress. The House of Representatives, which probably will remain in Republican hands, would choose the president, and the Senate, likely to remain controlled by Democrats, would select the vice president.
“If you stipulate that they act according to partisan interests, they would pick Biden even if the House has picked Romney,” said Edward Foley, director of the election law program at Ohio State University’s Moritz College of Law in Columbus.
The new House would choose the president, voting by state delegations, with a candidate needing 26 states to win. Right now, Republicans control 33 House delegations and Democrats 14, with three states split evenly.
The Senate, voting as individuals, would select the vice president. Counting the two independents who caucus with them, Democrats now hold a 53-47 edge in that body.