Former President Obama tweeted Saturday that he is “proud of” how former staffers of his administration are “continuing to fight for an America that’s better” after they penned an op-ed blasting President TrumpDonald John TrumpHillary Clinton responds to Chrissy Teigen tweet: 'I love you back' Police called after Florida moms refuse to wear face masks at school board meeting about mask policy Supreme Court rejects Trump effort to shorten North Carolina mail-ballot deadline MORE for his “poisoning of our democracy.”

“I’ve always been proud of what this team accomplished during my administration,” he tweeted with a link to the op-ed, which was published by The Washington Post on Friday.

“But more than what we did, I’m proud of how they’re continuing to fight for an America that’s better,” he continued.

The op-ed, titled “We are African Americans, we are patriots, and we refuse to sit idly by,” was penned by 149 African American alumni of the Obama administration in support of congresswomen of color who were recently attacked by the president and told to “go back” to their home countries.

“We stand with congresswomen Ilhan OmarIlhan OmarOcasio-Cortez: Republicans don't believe Democrats 'have the stones to play hardball' Progressive lawmakers call for United Nations probe into DHS 'human rights abuses' Ocasio-Cortez hits Trump for 'disrespect' over calling her AOC during debates MORE, Alexandria Ocasio-CortezAlexandria Ocasio-CortezOVERNIGHT ENERGY: Trump strips protections for Tongass forest, opening it to logging | Interior 'propaganda' video and tweets may violate ethics laws, experts say | Democrats see Green New Deal yielding gains despite GOP attacks Ocasio-Cortez says she doesn't plan on 'staying in the House forever' Ocasio-Cortez: 'Trump is the racist visionary, but McConnell gets the job done' MORE, Ayanna PressleyAyanna PressleyProgressive lawmakers call for United Nations probe into DHS 'human rights abuses' Ocasio-Cortez hits Trump for 'disrespect' over calling her AOC during debates Democrats unveil bill to reduce police violence against people with mental illness MORE and Rashida TlaibRashida Harbi TlaibProgressive lawmakers call for United Nations probe into DHS 'human rights abuses' Ocasio-Cortez hits Trump for 'disrespect' over calling her AOC during debates Ocasio-Cortez draws hundreds of thousands of viewers on Twitch livestream MORE, as well as all those currently under attack by President Trump, along with his supporters and his enablers, who feel deputized to decide who belongs here — and who does not,”  they wrote in the op-ed.

“We refuse to sit idly by as racism, sexism, homophobia and xenophobia are wielded by the president and any elected official complicit in the poisoning of our democracy,” they added.

In recent weeks, Trump has come under fire for comments targeting the four minority lawmakers, which were condemned as “racist” in a resolution passed by the House this month.

The op-ed’s release came as the president begins to face a new wave of backlash after he called House Oversight and Reform Committee Chairman Elijah CummingsElijah Eugene Cummings'Kamala' and 'Kobe' surge in popularity among baby names Women of color flex political might Black GOP candidate accuses Behar of wearing black face in heated interview MORE (D-Md.), who is African American, a “brutal bully” and said his Baltimore district is a “rat and rodent infested mess.”

“Rep, Elijah Cummings has been a brutal bully, shouting and screaming at the great men & women of Border Patrol about conditions at the Southern Border, when actually his Baltimore district is FAR WORSE and more dangerous,” Trump tweeted.

“His district is considered the Worst in the USA as proven last week during a Congressional tour, the Border is clean, efficient & well run, just very crowded,” Trump continued. “Cumming District is a disgusting, rat and rodent infested mess. If he spent more time in Baltimore, maybe he could help clean up this very dangerous & filthy place.”

Speaker Nancy PelosiNancy PelosiPelosi: Trump should accept election results 'like a man' The spectre of pension failures haunts this election Microsoft: Iranian hacking group targeting attendees of major international security conferences MORE (D-Calif.) denounced Trump's criticisms targeting Cummings as "racist" in a tweet later on Saturday and praised the congressman as "a beloved leader."