COLUMBIA, Mo. (AP) - Republican U.S. Rep. Ann Wagner of Missouri on Monday said she's not running for Democratic U.S. Sen. Claire McCaskill's seat in 2018, leaving the GOP field open for what likely will be a highly competitive race.
Wagner said in a statement that she's instead opting to defend her suburban St. Louis U.S. House seat.
"While I am grateful for the incredible support and encouragement I have received from across Missouri to run for United States Senate, I am announcing today my intention to run for re-election to the United States House of Representatives in 2018," Wagner said, adding that "there is no greater honor than representing a place and people that I love."
Wagner's announcement creates an opening for other Republican candidates eyeing a U.S. Senate race that's already drawing national interest. McCaskill is among 10 Senate Democrats running in 2018 in states won by President Donald Trump.
Several high-profile Republicans have been publicly pushing for Republican Attorney General Josh Hawley to run, although he hasn't yet said whether he'll enter the race. Former Sen. John Danforth and prominent donor David Humphreys were among several high-profile Republicans who in April released a public letter encouraging him.
Hawley also has allies within the Missouri Republican Party, which is headed by Chairman Todd Graves. Graves led Hawley's transition team as he prepared to take office after the November election.
Both Republicans and Democratic party officials conceded that McCaskill is a good candidate and that the race will be, as Republican Party Executive Director Austin Stukins said, "extremely competitive."
McCaskill first was elected to U.S. Senate in 2006 and faced a challenging bid for re-election in 2012. During that race, she sought to help former U.S. Rep. Todd Akin win the Republican primary, hoping he would be the easiest candidate for her to defeat. That paid off after Akin won the Republican nomination, then doomed his chances by telling a TV interviewer that women's bodies have ways of preventing pregnancy in cases of "legitimate rape."
"Republicans know that... you can't outwork Claire McCaskill," Missouri Democratic Party Chairman Stephen Webber said. "She's got a unique ability to connect with Missourians, and I think it's making people think twice."
Stukins said McCaskill is a "good politician," but he said her voting record as a Democrat will work against her in a state he said has been trending Republican in recent elections.
"We've got to hold the seats that we have and we've got to take seats where we can," Stukins said. "We certainly think that McCaskill's seat is one we can take in 2018."