 Joe Biden is on the ropes. It's been three weeks now since the U.S. president's alarming performance in the debate, and more and more Democratic lawmakers are calling on him to end his reelection campaign. Today, several House members sent a joint letter to Mr. Biden asking him to withdraw from the race, and a third senator, Martin Heinrich, joined the chorus of calls for him to pass the torch. The pressure is especially intense right now because Donald Trump is leading in the polls and Democratic fundraising efforts are faltering.