Democratic Rep. Jasmine Crockett launched a campaign Monday for the U.S. Senate in Texas, telling President Donald Trump, “I'm coming for you," and bringing a national profile to what could be a critical race for Democrats’ long-shot hopes of reclaiming a Senate majority in next year’s midterm elections.

Crockett, one of Congress’ most outspoken Democrats, a frequent target of GOP attacks and a Trump target, jumped into the race on the final day of qualifying in Texas. She is seeking the Senate seat held by Republican John Cornyn, who is running for reelection in the GOP-dominated state.

“As a candidate who is constantly attacked and seen as a threat, it's because I am,” Crockett told supporters in Dallas. “I'm the only one who has gone toe to toe with Donald Trump, and there's a reason he's always got my name in his mouth.”

Democrats need a net gain of four Senate seats to wrest control from Republicans next November, when most of the seats up for reelection are in states like Texas that President Donald Trump won last year. Democrats have long hoped to make Texas more competitive after decades of Republican dominance. Cornyn, first elected to the Senate since 2002, is facing the toughest GOP primary of his career against Texas Attorney General Ken Paxton and U.S. Rep. Wesley Hunt.

Crockett’s announcement came hours after former Rep. Colin Allred ended his own campaign for the Democratic nomination in favor of attempting a House comeback bid. She faces a March 3 primary against Democratic state Rep. James Talarico, a former teacher with a rising national profile fueled by viral social media posts challenging Republican policies such as private school vouchers and requiring the Ten Commandments in classrooms.