Elizabeth Warren is keeping her cards close to the vest.

Days after dropping out of the 2020 Democratic primaries, the Massachusetts senator is weighing her options about who to endorse.

With the race now a contest between Bernie Sanders and Joe Biden, Warren remains the last big-ticket former candidate to remain uncommitted.

People in the know say Warren — at a relatively youthful 70 — is already looking ahead to 2024.

“The long and short of it is she has not ruled out a future that involves running for president,” one Senate insider told The Post. “She will be 74 in 2024 and that is a realistic variable. She and the people around her are weighing it.”

Though many establishment Democrats spent months fretting that Sanders could sew up the nomination in a fractured race, Biden swiftly consolidated the support of his former rivals after a knockout showing in South Carolina and Super Tuesday. Former South Bend mayor Pete Buttigieg, Sen. Amy Klobuchar and ex-NYC mayor Mike Bloomberg all announced their support of Biden immediately after leaving the race.

Though Warren is generally closer to Sanders on policy, there is significant bad blood between the two stemming from claims that Sanders told Warren in a private conversation that a woman could not win the 2020 election. Sanders vehemently denied ever making the remark.

“She wants to endorse,” said the DC insider adding that a decision was definitely coming soon. “She does not want to fade out of this race.”