Former Vice President Joe Biden is challenging President Donald Trump.

Joe Biden was elected to the presidency on his third try.

The former New York City mayor has entered the race of president.

He was the first openly gay man to launch a major bid for the presidency.

Gabbard is one of the first two female combat veterans to serve in Congress.

Klobuchar had two sixth place finishes in Nevada and South Carolina.

Sanders is the longest serving independent member of Congress in U.S. history.

Sen. Elizabeth Warren was the last remaining woman candidate in the top tier.

The Colorado senator was the 21st Democrat to enter the field.

Two-term Montana Gov. Steve Bullock has ended his run for the White House.

De Blasio dropped out after failing to gain traction in a crowded primary field.

It was once thought Cory Booker could become the first black U.S. president.

Castro dropped his White House bid after falling short in polling, fundraising.

John Delaney announced he was running for president in July 2017.

Her campaign struggled to gain traction from the start. She dropped out Aug. 28.

Having failed to make a debate stage, Gravel's team ended their campaign Aug. 7.

Harris becomes the first woman to serve as vice president.

Hickenlooper suspended his campaign due to low poll numbers and a lack of donors

He dropped out of the race on Aug. 21 and is seeking a third term as governor.

The little-known Florida mayor suspended his campaign in November.

He dropped out on Aug. 23 and will seek re-election in the House.

When he lost to Sen. Ted Cruz, there was speculation he would run for president.

He was the first African American elected to be Massachusetts governor.

The Ohio congressman said he will seek re-election for his House seat.

Sestak announced he was dropping out of the race in a December 2019 tweet.

The billionaire liberal activist cast himself as an outsider.

Gun control was at the top of Swalwell's agenda.

The author, spiritual teacher and Oprah Winfrey confidant suspended her campaign

Yang crafted a campaign platform around the issue of universal basic income.