President Donald Trump on Tuesday endorsed Texas Attorney General Ken Paxton in the GOP primary for U.S. Senate, supercharging his effort to oust incumbent Sen. John Cornyn in next week’s runoff.

It seemed like the end of the road for Ken Paxton.

“Who’s a better person to help [the Trump administration] — someone who’s seen as a steady hand and has been there and understands how things work and how things don’t work?” Burgess said in an interv...