Originally posted by the Voice of America. Voice of America content is produced by the Voice of America, a United States federal government-sponsored entity, and is in the public domain. US Senate Races Tighten Ahead of Election Katherine Gypson WASHINGTON - With days left until the U.S. election, Democrats are in a position to win a handful of Senate races that could give them control of the chamber in 2021. No matter who wins the White House, party control of the Senate will be a key factor determining how much work gets done in Washington for the next two years. Republicans currently have a 53-47 Senate majority. If Democratic presidential candidate Joe Biden wins the presidency, Democrats would need a net pickup of just three Senate seats to assume the majority. If U.S. President Donald Trump is elected to a second term, Democrats would need to gain four Senate seats to have a working majority. According to the nonpartisan Cook Political Report, seven of the 35 U.S. Senate seats up for reelection November 3 are races that are too close to call. All seven of those seats are currently Republican-held. Additionally, in this cycle Republicans are defending nearly twice as many seats as Democrats, making it more challenging for Republicans to maintain their numbers. Of the 12 Democrat-held U.S. Senate seats up for reelection, only one is rated by Cook Political Report as leaning Republican -- the Alabama race between Senator Doug Jones and his Trump-endorsed Republican challenger Tommy Tuberville. The former football coach has been leading Jones in the polls by double digits since the summer. Casey Burgat, director of the Legislative Affairs program at the George Washington University Graduate School of Political Management, saidpolling data showing a shift in Democrats' favor reflect how many races have been nationalized by Trump's presence at the top of the ticket. "If we think of elections as referendums on those incumbents, Republicans are in a really tight spot right now, led by President Trump," he said. "Candidates are having to work in their seats to distance themselves, to show a streak of independence to say that 'I'm just not a vote for an unpopular president.' States where just four years ago he was incredibly popular - being that he brought in some senators to the Senate based on his election tally. So quite a shift in a few short years." Here's where a handful of key races stand: .