Congressman Joaquin Castro will not challenge Senator Ted Cruz, in 2018.
According to the Texas Tribune, Castro ruled out a Senate challenge to Cruz today, which now makes Congressman Beto O'Rourke the frontrunner for the Democratic Party's nomination for U.S. Senate.
Castro's decision to not contest the race leaves O'Rourke as the lone Democrat challenging Cruz. Thus far, Cruz has not drawn any Republican challengers.
