Former Presidents Bill Clinton William (Bill) Jefferson ClintonChelsea Clinton: Trump isn't building public confidence in a vaccine Hillary Clinton launching podcast this month GOP brushes back charges of hypocrisy in Supreme Court fight MORE, George W. Bush and Barack Obama Barack Hussein ObamaMichelle Obama and Jennifer Lopez exchange Ginsburg memories Pence defends Trump's 'obligation' to nominate new Supreme Court justice The militia menace MORE took to social media on Monday to honor America's fallen service members on Memorial Day.

Obama shared a photo of himself in front of the Tomb of the Unknown Soldier with a message honoring "our fallen heroes."

We can never truly repay the debt we owe our fallen heroes. But we can remember them, honor their sacrifice, and affirm in our own lives those enduring ideals of justice, equality, and opportunity for which generations of Americans have given that last full measure of devotion. pic.twitter.com/pRxwmaMClL — Barack Obama (@BarackObama) May 28, 2018

Clinton kept his twitter message short, writing: “Remembering, honoring, and thanking all who served our great country.”

Remembering, honoring, and thanking all who served our great country. #MemorialDay2018 — Bill Clinton (@BillClinton) May 28, 2018

Bush shared on Instagram a portrait he painted of David Wright, a marine who died this month, and honored “the brave souls who have given their lives in defense of our country.”

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“May we honor them in thought and in deed this #MemorialDay,” he added.