The 2020 Democratic primary field is getting larger each day.
With half a dozen candidates already in the race and dozens more considering it, Democrats will have no shortage of candidates seeking to win the nomination to oppose President Donald Trump in 2020.
The presidential candidates include a cross section of society -- political veterans such as senators and governors as well as political newcomers.
Here is a look at the 14 announced Democratic 2020 presidential candidates through March 25. The candidates are listed in alphabetical order by last name.
- Cory Booker -- Booker, 49, has served as the junior U.S. senator from New Jersey since 2013. He announced his presidential candidacy on Feb. 1.
The first African-American U.S. senator from New Jersey, he was previously the mayor of Newark from 2006 to 2013.
- Julian Castro -- Castro, 44, is the former mayor of San Antonio, Texas, serving from 2009 to 2014. He announced his presidential candidacy Jan. 12.
A native of Texas, Castro was U.S. secretary of housing and urban development, serving until 2017.
- John Delaney -- Delaney, 55, a multimillionaire businessman and former Maryland congressional representative, announced he was running for president in July 2017.
In 2012, Delaney ran for Maryland's U.S. House District 6 and won. He served for three terms.
- Tulsi Gabbard -- Gabbard, 37, has served as the U.S. representative for Hawaii's 2nd Congressional District since 2013. She announced her presidential candidacy on Jan. 11 and launched Feb. 2.
She is the first Samoan American and the first Hindu member of Congress.
Gabbard served in the Hawaii House of Representatives from 2002 to 2004, being the youngest woman elected to a U.S. state legislature.
- Kirsten Gillibrand -- A New York Democrat and attorney, Gillibrand, 52, announced in January 2019 she was running for president. She officially launched her campaign March 17.
Gillibrand was elected to the U.S. House of Representatives in 2006. She served in the U.S. House until 2009.
In 2009, Gillibrand was appointed to fill the Senate seat vacated by Hillary Clinton. She won a special election in 2010 to keep the seat as the state's junior senator and was subsequently re-elected to full terms in 2012 and 2018.
- Kamala Harris -- Harris, 54, has served as the junior U.S. senator from California since 2017. She announced her presidential candidacy Jan. 27.
Harris previously served as attorney general of California from 2011 to 2017, and as the district attorney of San Francisco from 2004 to 2011.
- John Hickenlooper -- Hickenlooperm, 67, a businessman, served as governor of Colorado from 2011 to 2019. He announced his presidential candidacy March 4.
Prior to serving as governor, Hickenlooper was mayor of Denver from 2003 to 2011.
- Jay Inslee -- An author and a lawyer, Inslee, 68, has served as governor of Washington since 2013. He announced his candidacy for president March 1.
Inslee served in the Washington House of Representatives from 1989 to 1993 and in the U.S. House of Representatives from 1993 to 1995 and again from 1999 until 2012.
- Amy Klobuchar -- Klobuchar, 58, an attorney, serves as the senior senator from Minnesota. She announced her presidential candidacy Feb. 9.
She served as an attorney for Minnesota's most populous county from 1999-2007 before being elected to the U.S. Senate in 2006.
- Beto O’Rourke -- A Texas Democrat, O'Rourke, 46, announced he was running for president March 14.
O'Rourke served on the El Paso City Council from 2005 to 2011 and was elected to the U.S. House of Representatives in 2012. He sought election to the U.S. Senate in 2018 but was defeated by Republican incumbent Sen. Ted Cruz.
- Bernie Sanders -- Sanders, who has served as Vermont's junior senator since 2007, announced his presidential candidacy Feb. 19.
Sanders was elected to the U.S. House of Representatives in 1990, where he served until 2006 before being elected to the U.S. Senate.
This is Sanders' second run at the U.S. presidency. He ran in 2016 before losing to Hillary Clinton.
- Elizabeth Warren -- Warren, 69, has erves as the senior senator from Massachusetts since 2013. She announced her presidential run Feb. 9.
Warren was elected to the U.S. Senate in 2012 and again in 2018.
- Marianne Williamson -- Williamson, 66, is an American spiritual teacher, author, lecturer, entrepreneur and activist. She announced her candidacy on Jan. 29.
A Texas native, Williamson has written several books of a metaphysical nature and has owned a metaphysical bookstore.
In 2014, as an independent, Williamson ran unsuccessfully for the U.S. House in California's 33rd Congressional District.
Her run at president is the second time she has sought political office.
- Andrew Yang -- Yang, 44, a former tech executive and entrepreneur, filed to run for president on Nov. 6, 2017.
The 2020 presidential run is Yang's first foray into politics.