Many progressives have urged Democratic leaders to kill the filibuster, warning that if they don't, Senate Republicans will obstruct Joe Biden's plans just as they did with the Obama administration. Former Senate aide Adam Jentleson, author of the new book "Kill Switch: The Rise of the Modern Senate and the Crippling of American Democracy," says the filibuster has historically been used to stop racial progress and thwart majority opinion. "The framers … did not want the filibuster to exist," he