US Rep. Julia Letlow will win the Republican nomination for Senate in Louisiana, CNN’s Decision Desk projects, defeating state Treasurer John Fleming in a runoff in which she made her endorsement from President Donald Trump a centerpiece of her pitch.

Letlow’s victory all but ensures another Trump ally will join the GOP’s Senate ranks next year from the deep-red state and delivers the president an immediate boost in demonstrating his continued influence with GOP primary voters after Republicans in two states earlier this month rejected his choices in their races for governor.

In her victory speech, Letlow thanked Trump for his endorsement and called him “the greatest president this country has ever had.” She said Fleming had called and conceded.

“I will fight for our families. I will fight for our farmers. I will fight for our teachers. I will fight for our parents. I will fight for our law enforcement. I will fight for everyone in this room,” Letlow told supporters. “Every breath I have left, I will be fighting for Louisiana.”

In a post on Truth Social, Trump said Letlow’s victory was “great news.”