Incumbent Democratic Sen. Jacky Rosen pulled ahead of her opponent, Republican Sam Brown, as Clark County added about 55,000 votes to its total late Wednesday.

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.

Polls showed Sen. Jacky Rosen leading Republican Sam Brown in Nevada as Election Day approached, but the state has historically posed polling difficulties.

With 47.7% of the vote, NewsNation/Decision Desk HQ has called the race for the U.S. Senate seat for Nevada in favor of Sen. Jacky Rosen. See all Nevada race results here. Democratic incumbent Sen. Jacky Rosen’s reelection bid against Republican challenger Sam Brown was considered one of the most competitive U.

Nevada Sen. Jacky Rosen was narrowly leading in Nevada’s Senate race against Republican candidate Sam Brown by about 1,300 votes Tuesday night.

Democratic Sen. Jacky Rosen trailed Republican Sam Brown by less than 1,000 votes as Nevada counties stopped reporting results early Wednesday morning. As of Wednesday at 3 a.m., Brown led Rosen by 870 votes — or 0.