Ted Cruz is ending his campaign

At the Five Thirty Eight blog, there is this: Patrick Svitek ✔ ‎@PatrickSvitek
Just in: @TedCruz is ending his presidential campaign, campaign manager Jeff Roe tells me.

Update from the Five Thirty Eight's proprietor Nate Silver:

Cruz is about to drop out of the Republican race, according to an array of well-sourced reporters on Twitter. Mathematically, that makes sense. After Trump’s huge win in Indiana tonight, Cruz’s delegate math was extremely daunting. National polls have also turned further against him, and most Republicans don’t want a contested convention, which was Cruz’s only chance at winning. I’m going to hold off on further comment until I hear more of Cruz’s speech, and watch whether he hints about an endorsement of Trump, or stays neutral or negative toward Trump in an effort to position himself toward 2020.