The 66-year-old Minnesotan, a former "Saturday Night Live" comedian who made a successful leap to liberal U.S. senator, announced his decision in a subdued Senate chamber three weeks after the first accusations of sexual misconduct emerged but just a day after most of his Democratic colleagues proclaimed he had to go. His remarks underscored the bitterness many in the party feel toward a GOP that they say has made a political calculation to tolerate Trump and Alabama GOP Senate candidate Roy Moore, who've both been accused of sexual assaults that they've denied.