Dean Phillips' Quixotic Bid Against Biden Leaves Democrats Baffled

House Democrats are puzzled by Rep. Dean Phillips' decision to launch a primary challenge against President Joe Biden, warning that it could harm his political career and boost Donald Trump's chances of winning the White House. Phillips, a moderate Minnesota Democrat, was seen as a rising star in the party but has resigned from his leadership position to call for a primary challenger against Biden, citing the president's age. Fellow Democrats are confused by his motivations and believe his bid is futile and potentially damaging to Biden's standing.