(CNN) — Sen. Cory Booker announced Monday that he will end his campaign after failing to qualify for the Democratic debate planned for Tuesday in Iowa. “It was a difficult decision to make, but I got in this race to win, and I’ve always said I wouldn’t continue if there was no longer a path to victory,” Booker said in an email to supporters Monday. The New Jersey Democrat’s announcement came a day before six presidential candidates will participate in the CNN/Des Moines Register’s debate in Des Moines, Iowa. He did not qualify for the event. It also came as the Senate gears up for the impeachment trial of President Donald Trump.