First lady Michelle Obama Michelle LeVaughn Robinson ObamaOvernight Defense: House to vote on military justice bill spurred by Vanessa Guillén death | Biden courts veterans after Trump's military controversies Biden courts veterans amid fallout from Trump military controversies The Hill's Campaign Report: Trump's rally risk | Biden ramps up legal team | Biden hits Trump over climate policy MORE on Monday tweeted her support for Rep. John Lewis (D-Ga.), who is in the midst of a very public feud with President-elect Donald Trump Donald John TrumpBarr criticizes DOJ in speech declaring all agency power 'is invested in the attorney general' Military leaders asked about using heat ray on protesters outside White House: report Powell warns failure to reach COVID-19 deal could 'scar and damage' economy MORE.

“Thinking of Dr. King and great leaders like @repjohnlewis who carry on his legacy. May their example be our call to action,” said the tweet posted on the first lady's account on Martin Luther King Jr. Day.

NEW: @FLOTUS tweets on Dr. Martin Luther King Jr. and @repjohnlewis: "May their example be our call to action." https://t.co/nYgr5Wou5U pic.twitter.com/nfnHiZ85Ci — ABC News Politics (@ABCPolitics) January 16, 2017

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Trump attacked Lewis on Twitter over the weekend for saying he is not a “legitimate president.”

"Congressman John Lewis should spend more time on fixing and helping his district, which is in horrible shape and falling apart (not to mention crime infested) rather than falsely complaining about the election results. All talk, talk, talk - no action or results. Sad!” Trump wrote in a series of tweets.

The civil rights leader is among a growing list of Democrats who are boycotting Trump’s inauguration on Friday.