One of Rep. Alexandria Ocasio-Cortez’s top lieutenants is leaving her office weeks after he compared moderate Democratic House members to southern segregationists.

Saikat Chakrabarti — a former Wall Streeter who worked on Sen. Bernie Sanders’ 2016 presidential campaign and pushed Ocasio-Cortez’s 2018 candidacy — is going to work for New Consensus, a group that advocates for a Green New Deal.

“I am extraordinarily grateful for his service to advance a bold agenda and improve the lives of the people in NY-14,” Ocasio-Cortez (D-Bronx/Queens) said in a statement distributed to several news outlets.

Chakrabarti, 33, angered some of Ocasio-Cortez’s colleagues early in July when he took to Twitter to compare moderate Democrats to southern segregationists.

Related: Alexandria Ocasio-Cortez at the State of the Union

17 PHOTOS Alexandria Ocasio-Cortez at the State of the Union 2019 See Gallery Alexandria Ocasio-Cortez at the State of the Union 2019 US Representative Alexandria Ocasio-Cortez (D-NY), dressed in white in tribute to the women's suffrage movement, arrives for the State of the Union address at the US Capitol in Washington, DC, on February 5, 2019. (Photo by SAUL LOEB / AFP) (Photo credit should read SAUL LOEB/AFP/Getty Images) Representative Alexandria Ocasio-Cortez, a Democrat from New York, speaks with colleagues during a State of the Union address by U.S. President Donald Trump, not pictured, to a joint session of Congress at the U.S. Capitol in Washington, D.C., U.S., on Tuesday, Feb. 5, 2019. President Donald Trump cast his fight against illegal migration to the U.S. as a moral struggle, and charged in his second State of the Union address that partisan investigations threaten economic progress under his administration. Photographer: Aaron P. Bernstein/Bloomberg via Getty Images Representative Nydia Velazquez, a Democrat of New York, from left, Representative Alexandria Ocasio-Cortez, a Democrat of New York, and Representative Judy Chu, a Democrat of California, speak prior to a State of the Union address by U.S. President Donald Trump, not pictured, to a joint session of Congress at the U.S. Capitol in Washington, D.C., U.S., on Tuesday, Feb. 5, 2019. President Donald Trump cast his fight against illegal migration to the U.S. as a moral struggle, and charged in his second State of the Union address that partisan investigations threaten economic progress under his administration. Photographer: Aaron P. Bernstein/Bloomberg via Getty Images US Representative Alexandria Ocasio-Cortez (D-NY) smiles, dressed in white in tribute to the women's suffrage movement, as she arrives for the State of the Union address at the US Capitol in Washington, DC, on February 5, 2019. - Omar wears a pin of Jakelin Caal, the Guatemalan migrant girl who died in US custody after illegally crossing the border with her father. (Photo by SAUL LOEB / AFP) (Photo credit should read SAUL LOEB/AFP/Getty Images) Representative Alexandria Ocasio-Cortez, a Democrat from New York, smiles as U.S. President Donald Trump, not pictured, delivers a State of the Union address to a joint session of Congress at the U.S. Capitol in Washington, D.C., U.S., on Tuesday, Feb. 5, 2019. President Donald Trump cast his fight against illegal migration to the U.S. as a moral struggle, and charged in his second State of the Union address that partisan investigations threaten economic progress under his administration. Photographer: Al Drago/Bloomberg via Getty Images WASHINGTON, DC - FEBRUARY 05: Rep. Alexandria Ocasio-Cortez (D-N.Y.) speaks with other women wearing white ahead of the State of the Union address before members of Congress in the House chamber of the U.S. Capitol on February 5, 2019 in Washington, DC. The Democratic women wore white as a reference to the suffragette movement. This year marks the 100th anniversary of women having the right to vote. (Photo by Ricky Carioti/The Washington Post via Getty Images) WASHINGTON, DC - FEBRUARY 05: Rep. Alexandria Ocasio-Cortez (D-N.Y.) high-fives other congresswomen after President Donald J. Trump acknowledged newly elected female members of congress during the State of the Union address before members of Congress in the House chamber of the U.S. Capitol February 5, 2019 in Washington, DC. (Photo by Toni L. Sandys/The Washington Post via Getty Images) WASHINGTON, DC - FEBRUARY 05: Rep. Alexandria Ocasio-Cortez (D-NY) speaks to Rep. Adam Schiff (D-CA) ahead of the State of the Union address in the chamber of the U.S. House of Representatives at the U.S. Capitol Building on February 5, 2019 in Washington, DC. President Trump's second State of the Union address was postponed one week due to the partial government shutdown. (Photo by Zach Gibson/Getty Images) UNITED STATES - FEBRUARY 05: First row from left, Reps. Nita Lowey, D-N.Y., Nydia Velazquez, D-N.Y., Alexandria Ocasio-Cortez, D-N.Y., Judy Chu, D-Calif., and Del. Eleanor Holmes Norton, D-D.C., are seen in the House Chamber as President Donald Trump delivered his State of the Union address on Tuesday, February 5, 2019. (Photo By Tom Williams/CQ Roll Call) UNITED STATES - FEBRUARY 05: Reps. Alexandria Ocasio-Cortez, D-N.Y., right, high fives Nydia Velazquez, D-N.Y., as Democratic members celebrate in the House Chamber as President Donald Trump recognized their achievement of electing a record number of women to Congress, during the State of the Union address on Tuesday, February 5, 2019. (Photo By Tom Williams/CQ Roll Call) UNITED STATES - FEBRUARY 5: Rep. Alexandria Ocasio-Cortez, D-N.Y., right, walks with her State of the Union guest Ana Maria Archila to the House chamber for President Donald Trump's State of the Union address to a joint session of Congress in the Capitol on Tuesday, Feb. 5, 2019. (Photo By Bill Clark/CQ Roll Call) WASHINGTON, DC - FEBRUARY 05: Rep. Alexandria Ocasio-Cortez (D-NY) watches President Donald Trump's State of the Union address in the chamber of the U.S. House of Representatives at the U.S. Capitol Building on February 5, 2019 in Washington, DC. A group of female Democratic lawmakers chose to wear white to the speech in solidarity with women and a nod to the suffragette movement. (Photo by Alex Wong/Getty Images) WASHINGTON, DC - FEBRUARY 05: Rep. Alexandria Ocasio-Cortez (D-NY) watches President Donald Trump's State of the Union address in the chamber of the U.S. House of Representatives at the U.S. Capitol Building on February 5, 2019 in Washington, DC. A group of female Democratic lawmakers chose to wear white to the speech in solidarity with women and a nod to the suffragette movement. (Photo by Alex Wong/Getty Images) WASHINGTON, DC - FEBRUARY 05: Rep. Alexandria Ocasio-Cortez (D-NY) and other female lawmakers cheer during President Donald Trump's State of the Union address in the chamber of the U.S. House of Representatives at the U.S. Capitol Building on February 5, 2019 in Washington, DC. A group of female Democratic lawmakers chose to wear white to the speech in solidarity with women and a nod to the suffragette movement. (Photo by Chip Somodevilla/Getty Images) UNITED STATES - FEBRUARY 05: Rep. Alexandria Ocasio-Cortez, D-N.Y., attends a group photo of House Democrats in the Capitol Visitor Center, who plan to wear 'suffragette white' to the State of the Union address to show solidarity for women's agendas on Tuesday, February 5, 2019. (Photo By Tom Williams/CQ Roll Call) UNITED STATES - FEBRUARY 05: First row from left, Reps. Jan Schakowsky, D-Ill., Sylvia Garcia, D-Texas, Speaker Nancy Pelosi, D-Calif., and Alma Adams, D-N.C., pose for a group photo of House Democrats in the Capitol Visitor Center, who plan to wear 'suffragette white' to the State of the Union address to show solidarity for women's agendas on Tuesday, February 5, 2019. (Photo By Tom Williams/CQ Roll Call) UNITED STATES - FEBRUARY 05: Rep. Alexandria Ocasio-Cortez, D-N.Y., right, greets Rep. Nita Lowey, D-N.Y., after a group photo of House Democrats in the Capitol Visitor Center who will wear 'suffragette white' to the State of the Union address to show solidarity for women's agendas on Tuesday, February 5, 2019. (Photo By Tom Williams/CQ Roll Call) Up Next See Gallery Discover More Like This HIDE CAPTION SHOW CAPTION of SEE ALL BACK TO SLIDE

“Instead of ‘fiscally conservative but socially liberal,’ let’s call the New Democrats and Blue Dog Caucus the ‘New Southern Democrats,’ ” Chakrabarti wrote in a tweet that is now deleted. “They certainly seem hell bent to do to black and brown people today what the old Southern Democrats did in the 40s.”

Chakrabarti made a veiled allegation of racism against Rep. Sharice Davids (D-Kansas) after she voted in late June for a bipartisan bill to appropriate money to government operations on the southern border. Chakrabarti said of Davids: “Her votes are showing her to enable a racist system.”

That drew a sharp rebuke from the official House Democrats’ Twitter account, which is managed by Rep. Hakeem Jeffries (D-Brooklyn): “Who is this guy and why is he explicitly singling out a Native American woman of color?”

That tweet has been deleted too.

The feud led House Speaker Nancy Pelosi (D-Calif.) to rebuke Ocasio-Cortez and other progressive House Democrats. “You got a complaint? You come and talk to me about it. But do not tweet about our members and expect us to think that that is just OK,” Pelosi reportedly said.

New Consensus calls the Green New Deal “a sweeping economic mobilization to build a clean and just economy.” Chakrabarti is considered one of the architects of the Green New Deal movement.

Ocasio-Cortez’s media spokesman, Corbin Trent, is also reportedly leaving her Congressional office to work on her 2020 re-election campaign.

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