While President Joe Biden held a campaign rally in Madison, Wisconsin to reassure supporters he was still up to the task of seeing his campaign through to November, Democratic senators have been working on plans to unite in favor of convincing him to step aside. The Washington Post reported Friday that Sen. Mark Warner (D-Virginia), who chairs the powerful Senate Intelligence Committee, has been working behind the scenes to enlist a group of Senate Democrats to ask Biden to pass the torch to someone better suited to face former President Donald Trump. The Post reported that Warner is concerned…