Senate rankings: 5 seats most likely to flip The HillInternal polling memo has warning signs for Senate Republicans POLITICOWhy Trump voters are poised to swing the Senate majority: From the Politics Desk NBC NewsRepublicans’ Chances of Flipping Key Senate Seats With 3 Weeks to Election NewsweekEven the GOP’s Leaked Senate Super PAC Memo Says Ted Cruz Is in Trouble The Daily Beast