Senator Cory Booker (D-NJ) was the most prominent candidate for the Democratic nomination to drop out of the race recently, but more contestants have called it quits. Self-help author Marianne Williamson and Julian Castro, former secretary of Housing, have also buried their campaign dreams.
With former New York City mayor Michael Bloomberg joining the already crowded field in the end of November, The New York Times now counts 12 major candidates for the Democratic nomination.
As the debate rules have gotten stricter (only six candidates qualified for the seventh DNC debate in Des Moines, Iowa on Jan 15), many presidential hopefuls have dropped out of the race. Sen. Kamala Harris (D-CA) ended her campaign in early December despite being on track to qualify for the sixth debate in Los Angeles, while Rep. Tulsi Gabbard (D-HI) is continuing her run despite not having qualified for the most recent and the upcoming debate.
On the Republican side of things, there are two noteworthy candidates challenging President Donald Trump. Former governor of Massachusetts, William Weld, is the challenger with the backing of the Libertarian National Committee. Former Republican congressman and 2010 tea party supporter Joe Walsh entered the race in August.
Trump filed for a 2020 run on Jan 20, 2017, the day of his inauguration, according to the Federal Election Commission.