(Bob Daemmrich/Nexstar/KXAN via AP, Pool)WASHINGTON – Buoyed by massive fundraising success, Democratic Senate candidates are mounting a push in Republican states that few would have thought possible just a few months ago, placing continued GOP control of the chamber at risk. MJ Hegar in Texas reported raising over $13 million during the same period for her race against Republican Sen. John Cornyn. In deep-red Kentucky, Amy McGrath has posted strong fundraising numbers against Senate Majority Leader Mitch McConnell. In Mississippi, Mike Espy reported raising $4 million in his rematch against Republican Sen. Cindy Hyde-Smith. O'Rourke was criticized for being too stingy with his cash, only reluctantly aiding other Democrats, though he eventually donated large amounts to the Texas Democratic Party.