Senate Democrats are privately worried about their prospects of saving Sen. Jon Tester (D-MT), a crucial part of their razor-thin Senate majority, amid recent polls that show him down by mid to high single digits against GOP challenger Tim Sheehy. According to Axios, they are planning to expand the map and go after some less likely pickups to save their majority: Texas and Florida. “Democrats are signaling they want to expand the playing field and be in a position to steal Republican seats in states like Florida. Yes, it’s still red, but former President Trump isn’t expected to win by double d…