Donald Trump Donald John TrumpBiden leads Trump by 36 points nationally among Latinos: poll Trump dismisses climate change role in fires, says Newsom needs to manage forest better Jimmy Kimmel hits Trump for rallies while hosting Emmy Awards MORE's campaign is accusing Bernie Sanders Bernie SandersNYT editorial board remembers Ginsburg: She 'will forever have two legacies' Two GOP governors urge Republicans to hold off on Supreme Court nominee Sanders knocks McConnell: He's going against Ginsburg's 'dying wishes' MORE of betraying his supporters by endorsing Hillary Clinton Hillary Diane Rodham ClintonBiden leads Trump by 36 points nationally among Latinos: poll Democratic super PAC to hit Trump in battleground states over coronavirus deaths Battle lines drawn on precedent in Supreme Court fight MORE.

“Bernie’s endorsement becomes exhibit A in our rigged system,” senior policy adviser Stephen Miller said in a statement Tuesday.

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"The Democrat Party is disenfranchising its voters to benefit the select and privileged few.”

Miller said Sanders’s core principles have often contradicted Clinton’s policy stances on the campaign trail.

“The candidate who ran against special interests is endorsing the candidate who embodies special interests,” he said. "The candidate who warned that open borders destroy the working class is endorsing the candidate with the most open borders policy in our history.

“The candidate who wants to get money out of politics is voting for the candidate who has made a career out of making money from politics.”

Miller said Clinton's campaign message contradicts Sanders's.

“Today, Bernie Sanders will be endorsing one of the most pro-war, pro-Wall Street and pro-offshoring candidates in the history of the Democratic Party,” he said.

Sanders on Tuesday formally endorsed Clinton for president after a long primary battle.

“Secretary Clinton has won the Democratic nominating process, and I congratulate her for that,” he said in Portsmouth, N.H. “She will be the Democratic nominee for president, and I intend to do everything I can to make sure she will be the next president of the United States."

Trump, the GOP’s presumptive presidential nominee, said earlier Tuesday that Sanders’s supporters would be unhappy with him “selling out” to Clinton.