President Barack Obama** has won his bid to remain in the White House for four more years.

On Tuesday night, NBC and other TV news outlets reported that Obama, 51, defeated Republican nominee Mitt Romney -- securing a crucial majority of 274 electoral college votes just past 11 p.m. EST, after Obama won the crucial swing state of Ohio. Romney had secured 203 Electoral College votes at press time. (NBC reported that Romney's camp would not yet concede the Ohio win to Obama as of 11:45 p.m..)

In addition to Ohio, the President secured wins in similar up-for-grabs states of New Hampshire, Michigan, New Mexico, Iowa, Wisconsin and Minnesota. At press time, the races in Florida and Virginia -- also vital swing states -- remained too close to call, but would not provide Romney, 65, enough Electoral College votes to overcome Obama.

The former Massachusetts governor -- whose running mate was Wisconsin congressman Paul Ryan -- is expected to have a stronger showing with the popular vote.

Obama tweeted about his victory just past 11:30 p.m.

"Four more years." the 44th U.S. President wrote beneath a photo in which he embraces wife, First Lady Michelle Obama.

"This happened because of you. Thank you," he added. "We're all in this together. That's how we campaigned, and that's who we are. Thank you. -bo."

This article originally appeared on Usmagazine.com: President Barack Obama Wins Re-Election