The battle between Barack Obama and Mitt Romney for the White House might be hogging the limelight, but US voters will also elect the entire House of Representatives, one-third of the Senate and 13 governors in key elections today. Republicans are expected to keep control of the House of Representatives, while Democrats were tipped to remain in sway of the Senate in today's elections, media here reported.

The Senate's 100 members serve six-year terms and one third of the seats are up for election every two years. Republicans hold 47 seats. To retake control of the Senate, the Republican Party needs a net gain of four. With 23 Democratic seats up for grabs in a terrible economy, it seemed like a no-brainer that Republicans would be able to flip four. But it's now a struggle for the GOP, CNN reported.