Three days after President Donald Trump exploded a political bomb in Louisiana's Senate race by endorsing Republican Rep. Julia Letlow over incumbent GOP Sen. Bill Cassidy, Letlow announced her campaign. Letlow declared her candidacy at a closed-door business breakfast in Baton Rouge, Louisiana, Tuesday morning, according to Republican sources. And in a social media post and video that shortly followed, Letlow emphasized that "Louisiana deserves a conservative Senator who will not waver. I am honored to have President Trump's endorsement and trust."