Nevada could be Democrats’ biggest nightmare

The first thing Sen. Catherine Cortez Masto wants you to understand is that Nevada elections are always close.

“Nevada is a purple state and it’s independent and it’s strong,” she told me in early October, in a union hall she’d just used for a campaign event. “I also know a lot of the polling gets Nevada wrong, so I really don’t utilize or worry about that.”

If she sounds defensive, that’s because the country’s first and only Latina senator is quite literally the Democrat most at risk of losing her...