The latest batch of Axios/Survey Monkey polls shows that Democrats are in real danger of losing three U.S. Senate seats, which means they have no chance of capturing that chamber in 2018. In order to take control of the Senate, Democrats must hold on to all 10 seats currently up for grabs in states President Trump won in 2016. On top of that, they must snatch two seats from incumbent Republicans. According to these polls, Democrat incumbents in Florida, North Dakota, and Indiana are losing to their Republican challengers by three, five, and two points, respectively. Another endangered Democrat incumbent,...