The 1.6M voters who could determine the US election don't currently reside in the country

The U.S. election might hinge on voters currently residing tens of thousands of miles away, according to new estimates from the Democratic Party - prompting a flurry of new efforts to mobilize voters abroad and, they hope, swing the election in Vice President Kamala Harris' favor. 

According to the Democratic National Committee (DNC), an estimated 1.6 million U.S. voters living overseas are eligible to vote in one of seven swing states: Arizona, Georgia, Michigan, Nevada, North Carolina, Pennsylvania or Wisconsin. The states, which carry a combined total of 93 Electoral College votes, are considered to be crucial in deciding the next president in an increasingly tight race. 

Now, with Harris and former President Trump locked in a virtual dead heat just two weeks before Election Day, this bloc could carry more influence than ever. 

Democrats, for their part, are wasting little time in seizing upon what they see as a crucial demographic of U.S. voters overseas. 

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Earlier this year, the DNC announced a $300,000 investment in the group "Democrats Abroad," aimed at helping mobilize U.S. voters overseas. 

The investment is a first-of-its-kind donation from the DNC during a presidential campaign cycle, a spokesperson told Fox News.