(ROUGH CUT - NO REPORTER NARRATION) High-profile U.S. elections in Georgia, Florida and Arizona remained unresolved on Thursday (November 8), two days after the vote, with the prospect of legal challenges, recounts and ballot reviews setting the stage for possible weeks of uncertainty.

In Florida's U.S. Senate race, Republican Governor Rick Scott, with his lead over Democratic incumbent Bill Nelson narrowing, filed lawsuits on Thursday against election supervisors in two counties accusing them of failing to follow election law.

"Every day since the election the left-wing activists in Broward County have been coming up with more and more ballots out of nowhere.

We all know what is going on.

Every person in Florida knows exactly what is happening.

Their goal is to keep mysteriously finding more votes until the election turns out the way they want," said Scott.

A spokesman for Nelson, Dan McLaughlin, said the lawsuits were politically motivated and "borne out of desperation." Democrats on Tuesday won their first majority in the U.S. House of Representatives since 2010, while Republicans appeared likely to expand their two-seat advantage in the U.S. Senate.

In Florida, Scott's lead was narrowing on Thursday.

Nelson trailed by around 17,300 votes, or 0.21 percent, below the state's 0.25 threshold for a hand recount.