WASHINGTON, D.C. - The first votes of the 2020 presidential election won’t be cast for nearly a year. But the number of Democrats ready to challenge President Donald Trump continues to grow.

In case you missed any of the announcements, here is a list of the top Democratic candidates who have formally announced their bids or have launched an exploratory committee:

U.S. Rep. John Delaney (D-Md.)

Delaney, 55, was the first Democrat to formally announce his bid for the White House, doing so in July 2017. He served as the Congressman of Maryland’s 6thDistrict from 2013 through Jan. 3, 2019, stepping down to run for the presidency.

U.S. Rep. Tulsi Gabbard (D-Hawaii)

Gabbard, 37, has served as Congresswoman from Hawaii’s 2ndDistrict since 2013. She is an Iraq War veteran who currently serves as on the House Foreign Affairs Committee and House Armed Services Committee.

U.S. Sen. Elizabeth Warren (D-Mass.)

Warren, 69, is in her second term as a U.S. Senator from Massachusetts. She first announced the formation of an exploratory committee on Dec. 31, 2018, running on platforms such as “Medicaid for All.” Before becoming a U.S. Senator, Warren served as the special advisor for the  Consumer Financial Protection Bureau.

Julian Castro, Former HUD Secretary

Castro, 44, served as the Secretary for the Dept. of Housing and Urban Development under the Barack Obama administration from 2014-2017. A former mayor of San Antonio, Texas, Castro has been a rising star in the party. He launched his campaign on Jan. 12, 2019. Castro’s twin brother, Joaquin, is a member of Congress.

Mayor Pete Buttigieg, South Bend, Ind.

Buttigieg, 37, announced last week he has formed an exploratory committee for the 2020 presidential race. The mayor of South Bend, Indiana – a town of roughly 100,000 people near the University of Notre Dame – Buttigieg would be the first openly gay nominee from a major American party if he pulls off the longshot bid.

U.S. Sen. Kamala Harris (D-Calif.)

Harris, 54, formally announced her bid for the White House on Jan. 21 before holding a rally to announce her bid this week in her hometown of Oakland, California. First elected to the Senate in 2016, Harris has a decorated resume at the state level, first serving as the district attorney of San Francisco from 2004-2011 and then rising through the ranks to attorney general of California from 2011-2017 when she became senator.

U.S. Sen. Kirsten Gillibrand (D-N.Y.)

Gillibrand, 52, succeeded Hillary Clinton’s Senate seat in 2009. She formally launched her presidential bid earlier this month. Gillibrand has been a prominent voice in the “Me Too” movement and has expressed interest in centering her campaign around improving health care and education.

Andrew Yang, businessman

Yang, 44, is an entrepreneur first serving in a public capacity as a Presidential Ambassador for Global Entrepreneurship in 2015 under Obama. He is running on a platform that would guarantee $1,000 a month to Americans ages 18-64, a policy he’s calling the “Freedom Dividend,” similar to a Universal Basic Income. 

Who else could run?

Vermont Senator and 2016 Democratic candidate Bernie Sanders made headlines over the weekend when Yahoo! News reported Sanders could make an announcement “imminently”; Minnesota Senator Amy Klobuchar, former Colorado Gov. John Hickenlooper, and former Vice President Joe Biden have all hinted at runs of their own. Former Starbucks CEO Howard Schultz this week also reportedly is considering an independent run.

Trump safe as GOP nominee?

President Trump has already announced he will seek a second term. On Tuesday, former Republican Arizona Sen. Jeff Flake, who during his final year in office was often a vocal opponent of Trump, announced he will not seek the GOP nomination in 2020. However, he did not rule out an independent bid but did acknowledge the difficulty of such a race.