Democratic Sen. Tammy Duckworth of Illinois, who made a three-hour stop in Taiwan with fellow Democrat Christopher Coons of Delaware and Republican Dan Sullivan of Alaska, said their visit underscores bipartisan U.S. support for the democratic island that Beijing claims as its own renegade territory. Taiwan faces a severe vaccine shortage and has geopolitical significance as a flashpoint in U.S.-China relations. "I'm here to tell you that the United States will not let you stand alone," Duckworth said at the airport after landing on a U.S. military transport plane. "We will be by your side to make sure the people of Taiwan have what they need to get to the other side of the pandemic and beyond." Taiwan was included on a long list of places announced last week that would receive 25 million doses from the United States in what the Biden administration says is the first tranche of at least 80 million doses to be distributed globally. Most of the first tranche, including Taiwan's, will be sent through COVAX, a U.N.-backed program to distribute vaccines to low and middle-income countries.