WASHINGTON — Over his 22 years in Congress, U.S. Sen. John Cornyn has amassed untold power within the Republican Party, serving on high-ranking committees and ascending his party’s leadership ranks.

Texas Attorney General Ken Paxton collected $2.9 million in his first quarter raising money to fuel his Republican primary challenge to U.S. Sen. John Cornyn. Cornyn, the longtime incumbent, reported ...

Sen. John Cornyn of Texas became the first Republican Thursday to formally declare his intention to succeed outgoing Senate Minority Leader Mitch McConnell as the No. 1 GOPer in the upper chamber.

Cornyn has for years signaled he wanted to succeed his close ally GOP leader Mitch McConnell. He lost in a vote decided by the Republican members of the Senate.