Democrats are facing fresh problems in two pivotal Senate battlegrounds in which their nominees are facing attacks for being too progressive.
What's happening: In Wisconsin, GOP Sen. Ron Johnson has pulled ahead of Democrat Mandela Barnes in the latest wave of public polls. In Pennsylvania, recent polling suggests Democrat John Fetterman's double-digit advantage over Republican Mehmet Oz has shrunk to a statistical tie. They are vying for the seat held by retiring GOP Sen. Pat Toomey.
