It's a question some Democrats are pondering as the 2020 presidential election inches closer: Can their party represent change when three of its top candidates are not only familiar faces, but people in their retirement years?

Sen. Elizabeth Warren Elizabeth WarrenHarris joins women's voter mobilization event also featuring Pelosi, Gloria Steinem, Jane Fonda Judd Gregg: The Kamala threat — the Californiaization of America GOP set to release controversial Biden report MORE (Mass.) will enter her 70s in June. Sen. Bernie Sanders Bernie SandersButtigieg stands in as Pence for Harris's debate practice Bernie Sanders warns of 'nightmare scenario' if Trump refuses election results Harris joins women's voter mobilization event also featuring Pelosi, Gloria Steinem, Jane Fonda MORE (I-Vt.) is 77. Former Vice President Joe Biden Joe BidenOmar fires back at Trump over rally remarks: 'This is my country' Trump mocks Biden appearance, mask use ahead of first debate Trump attacks Omar for criticizing US: 'How did you do where you came from?' MORE will turn 76 later this month.

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Though the primaries are still a ways off, all three have emerged in early polls as favorites to be the 2020 Democratic nominee.

Some strategists say that might be a problem.

“Democrats would be better off with a young candidate,” said Democratic strategist Brad Bannon, who argued that an electorate that seems to want change might prefer someone from a younger generation.

He put it as a generational battle, this time between baby boomers and millennials.

“The desire for change is a function of a battle between an ascending generation, the millennials who want political power, and a descending generation, the baby boomers, who have the power but don't want to give it up,” he said.

There are certainly a number of candidates ready to step up if Democratic voters are looking for a younger nominee.

Sen. Kamala Harris Kamala HarrisButtigieg stands in as Pence for Harris's debate practice First presidential debate to cover coronavirus, Supreme Court Harris joins women's voter mobilization event also featuring Pelosi, Gloria Steinem, Jane Fonda MORE (Calif.), a freshman in the Senate, is 54. Sen. Cory Booker Cory Anthony BookerBipartisan praise pours in after Ginsburg's death DHS opens probe into allegations at Georgia ICE facility Democratic lawmakers call for an investigation into allegations of medical neglect at Georgia ICE facility MORE of New Jersey is 49, while Sen. Kirsten Gillibrand Kirsten GillibrandSunday shows preview: Justice Ginsburg dies, sparking partisan battle over vacancy before election Suburban moms are going to decide the 2020 election Jon Stewart urges Congress to help veterans exposed to burn pits MORE is 51.

Rep. Beto O’Rourke, who has sparkled as a challenger to GOP Sen. Ted Cruz Rafael (Ted) Edward CruzTrump argues full Supreme Court needed to settle potential election disputes Press: Notorious RBG vs Notorious GOP The Hill's Morning Report - Sponsored by Facebook - Washington on edge amid SCOTUS vacancy MORE and become a liberal fundraising force, is 46.

None of those candidates would qualify as millennials, but they are from a different generation than the trio at the top of the Democratic polls.

Earlier this year, Biden — who allies suggest may consider running for one term only — acknowledged that age is a “legitimate” issue for presidential candidates.

“I think it’s totally appropriate for people to look at me and say if I were to run for office again, ‘Well, God darn you’re old.’ Well, chronologically, I am old,” Biden said during a question and answer session at the Economic Club of Southwestern Michigan’s Speakers Series last month, according to CNN.

“Every voter is entitled to know exactly what kind of shape you’re in. You owe it to them. It’s a legitimate question and so I think age is relevant.”

But some Democrats say the 2020 election won't be so much about age at all, particularly when Democrats will be competing to take on the 72-year-old President Trump Donald John TrumpOmar fires back at Trump over rally remarks: 'This is my country' Pelosi: Trump hurrying to fill SCOTUS seat so he can repeal ObamaCare Trump mocks Biden appearance, mask use ahead of first debate MORE.

“To me, it's less about years of age and more about the age of your ideas and whether your ideas reflect what voters want to hear,” said Chris Kofinis, a Democratic strategist.

Still, he said that could be a problem for some candidates.

“The challenge with candidates like Sanders and Biden is that they've been around so long. Anytime a party is out of office it is attracted to a newer, bolder message.”

Democratic strategist Maria Cardona said she doesn’t think the age of some would-be candidates is problematic for the party.

Cardona pointed to 2016, when Sanders was “able to attract a massive following of young people,” and nearly beat Hillary Clinton Hillary Diane Rodham ClintonButtigieg stands in as Pence for Harris's debate practice Senate GOP sees early Supreme Court vote as political booster shot Poll: 51 percent of voters want to abolish the electoral college MORE in the Democratic primary.

Sanders was able to tap into a sentiment that Clinton represented the tired Washington establishment, and he positively electrified swaths of young voters.

During that race, the Vermont senator lured millennials to the race by talking about issues such as free public college, single-payer health care and campaign finance reform.

A survey conducted in early 2016 by pollster Frank Luntz showed that young voters selected Sanders when asked which politician they respected the most. Sanders even beat former President Obama, who at 57 is 20 years his junior, 31 percent to 18 percent, according to the poll.

“I think what’s important more than age is for the candidates to authentically speak to and make a connection with voters in every state and in every community and offer a platform of new ideas and real solutions for the problems the country is facing,” Cardona said.

Kofinis said that whoever wins will need to run a nimble, 21st century campaign that doesn’t rely on a playbook from previous years.

“It’s not going to be the age of the candidate but the age of their ideas and the age of their actual campaign,” he said.

One Democratic strategist said Warren’s recent release of her DNA test results fell into that category, “because it wasn’t anything a modern campaign would do. It was so incredibly reactive and pissed off so many Democrats.” One Democratic strategist said Warren’s recent release of her DNA test results fell into that category, “because it wasn’t anything a modern campaign would do. It was so incredibly reactive and pissed off so many Democrats.”