With the U.S. election as tight as it is, there's a theoretical, yet unlikely, scenario, in which the results could produce a President Mitt Romney and Vice-President Joe Biden administration.

While it may seem absurd, it is possible based on the U.S. electoral college system and the constitution which requires a candidate to win the majority of electoral votes — in this case 270 — to become president.

But if neither candidate reaches that majority of electoral college votes, the 12th Amendment says that the state delegations of the U.S. House of Representatives decide among the candidates who becomes president. The Republicans, who have and are expected to retain a majority in the House, would choose Romney as president.

The Senate is then given the task to pick the vice-president. If after the election it is still controlled by the Democrats, Biden would become vice-president. (In fact, if the Senate is split, Biden, as vice-president and head of the Senate, would cast the deciding vote.) And there you would have a Romney-Biden administration.

But how would that come into play?

There are an even number of electoral college votes (538) that the candidates could evenly spilt. U.S President Barack Obama could win 269 votes and Romney could win 269 votes. And this would all depend on how those crucial swing-states go.

http://ca.news.yahoo.com/romney-biden-white-house-possible-093929372.html