Biden's rise in 2020 race catches Trump's eye, unnerves his allies

Joe Biden’s rapid emergence as front-runner in the race for the 2020 Democratic presidential nomination has caught the attention of President Donald Trump and unnerved some of his allies, who believe Biden is a potentially dangerous rival. Biden soared from “will-he-or-won’t-he-run?” status to the head of the crowded Democratic field just days after announcing his candidacy last week, pulling away from Senator Bernie Sanders and a host of other rivals in opinion polls. A CNN poll gave Biden a 15-point lead in a field of 20 Democratic candidates. Some Trump advisers see the former vice president, with his mainstream blue-collar appeal, as a tough opponent in the three states that carried Trump to his improbable victory in 2016 - Michigan, Wisconsin and Pennsylvania.