Sen. Jacky Rosen, the freshman Nevada Democrat who grabbed a Senate seat Republicans held for nearly two decades, has won re-election. Late-arriving mail ballots put her over the top Thursday against Republican wounded Afghanistan combat veteran Sam Brown in the swing state.

Nevada Democrat Jacky Rosen is in a neck-and-neck battle in her bid to return to the U.S. Senate for a second term, while her party lost its slim voting majority in the upper chamber of Congress.