All but one of 2020's presidential candidates is over 70. Here's what that looks like.

The winner of the 2020 presidential race will likely make history as the oldest president ever elected – either to a first or second term.

With Sen. Amy Klobuchar leaving the race on Monday, Rep. Tulsi Gabbard is the only remaining candidate who will be under 70 on Inauguration Day Jan. 20, 2021.

More than a generation separates Gabbard and the rest of the presidential hopefuls. Gabbard is 40 years younger than Sen. Bernie Sanders and 39 years younger than former Vice President Joe Biden.

On the Republican side, President Donald Trump, the oldest first-term president, and former Massachusetts Gov. William Weld would also be in their mid-70s on Inauguration Day.

Joe Biden: No plans to limit himself to one-term in the White House

More: The oldest, youngest presidential candidates in history

Of course, age has little to do with a president’s success. John F. Kennedy (the youngest elected president) and Ronald Reagan (the oldest) rank among the top 15 of U.S. presidents, according to Siena College's annual poll.

Still, age is a lens that colors our view of the world. Gabbard was about 7 when the modern internet was born; Biden, Bloomberg and Sanders were born during World War II and lived through a handful of other wars and conflicts.

About the candidates

Bernie Sanders

Experience: Senator, 2007-present; representative from Vermont, 1991-2000

Quote: "Our health care system today essentially says that if you happen to be poor, you are less deserving of getting care than a wealthy person. That is fundamentally immoral and that is not the kind of nation we should be."

Fast facts: Sanders sought the Democratic nomination in 2016 as well as 2020, but he has run as an independent for other offices he has sought. Before being elected in 1990, he lost two Senate and three gubernatorial campaigns.

Campaign site: berniesanders.com

Joe Biden

Experience: Vice president, 2009-2017; senator from Delaware, 1973-2009

Quote: "It’s time to get up and get off our backs and remember the hell who we are."

Fast facts: This is the third time Joe Biden has run for president. He also sought the Democratic nomination in 1988 and 2008.

Website: joebiden.com

William Weld

Experience: Governor, 1991-1997; former U.S. attorney

Quote: "We have a president whose priorities are skewed towards promotion of himself rather than for the good of the country."

Fast facts: Weld ran for vice president on the Libertarian Party ticket in 2016. In 1974, he was an associate minority counsel to the House Judiciary Committee during the Watergate investigation.

Campaign site: weld2020.org

Donald Trump

Experience: President, 2017-present; real estate developer; reality TV star

Quote: "America is governed by Americans. We reject the ideology of globalism, and we embrace the doctrine of patriotism."

Fast facts: Trump filed for reelection the day he was inaugurated, and his campaign already has raised more than $100 million.

Campaign site: donaldjtrump.com

Elizabeth Warren

Experience: Senator, 2013-present; Congressional Oversight Panel chair for the Troubled Asset Relief Program, 2008-2010; former Harvard Law School professor.

Quote: "The man in the White House is not the cause of what’s broken, he’s just the latest – and most extreme – symptom of what’s gone wrong in America: a product of a rigged system that props up the rich and the powerful and kicks dirt on everyone else."

Fast facts: Warren came into the spotlight for criticizing Wall Street, banks and large corporations after the 2008 financial crisis.

Campaign site: elizabethwarren.com

Tulsi Gabbard

Experience: Representative, 2013-present; Honolulu City Council, 2010-2012; State representative, 2002-2004.

Quote: "I’m running for president to end regime change wars, work to end the new Cold War and nuclear arms race, and take the trillions of dollars wasted on these wars and put it back in the pockets of the American people."

Fast facts: Born in Leloaloa, American Samoa, Gabbard is the first Hindu member of Congress. She served in the Hawaii National Guard and was deployed to Iraq in 2004.

Campaign site: votetulsi.com

This article originally appeared on USA TODAY: Presidential candidate ages: Four decades separate 2020's hopefuls