The Army veteran was endorsed by President Donald Trump and saw millions in outside spending on her behalf. Cain, meanwhile, was backed by Gov. Greg Abbott.

With their Republican nominations in hand, the two are favored to win their GOP-leaning seats in November to replace outgoing Reps. Jodey Arrington and Wesley Hunt.

Middleton, a conservative state senator and oil and gas executive, put more than $16 million of his own money into the race.