Sen. John Cornyn has finally climbed within the margin of error against Texas Attorney General Ken Paxton in new, independent polling of Texas GOP primary voters. Why it matters: It's the first poll since outside groups spent millions of dollars on pro-Cornyn advertising,

Every previous public poll had shown the attorney general with a considerable lead over Texas’ incumbent senator.

Republican Texas Sen. John Cornyn and Republican Texas Attorney General Ken Paxton are neck and neck in the state’s bruising