Donald TrumpDonald John TrumpTrump passes Pence a dangerous buck Overnight Health Care — Presented by American Health Care Association — Trump taps Pence to lead coronavirus response | Trump accuses Pelosi of trying to create panic | CDC confirms case of 'unknown' origin | Schumer wants .5 billion in emergency funds Trump nods at reputation as germaphobe during coronavirus briefing: 'I try to bail out as much as possible' after sneezes MORE's new campaign manager, Kellyanne Conway, called for Trump to release his tax returns in April, according to CNN video highlighted by Media Matters.

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Then head of a super-PAC supporting Trump rival Ted CruzRafael (Ted) Edward CruzSteyer calls for Senate term limits to pass gun control legislation Cruz targets California governor over housing 'prescriptions' This week: House to vote on legislation to make lynching a federal hate crime MORE, Conway was asked in an April 25 CNN interview if the "alliance" between John Kasich and Ted Cruz was fair. "Of course it's fair game," she said. "Oh absolutely. It's completely transparent. Donald Trump's tax returns aren't, and I would like to see those be transparent."

Conway, a veteran GOP pollster who was hired by Trump on July 1 and became his campaign manager this week, has also criticized the GOP presidential nominee on a number of other important issues.

On Feb. 10, Conway blasted Trump's claim that he is "for the little guy," questioning his business ethics.

Trump "actually built a lot of his business on the backs of the little guy” she said on CNN, adding that Trump is known for “not paying contractors after [they have helped him] build something."

She also sharply critiqued the businessman in the past over Trump University, his use of personal insults, and simply "saying things that aren't true," the left-leaning group said.

A number of other top Republicans have also blasted Trump for not releasing his tax returns.

"Either he's not anywhere near as wealthy as he says he is [or] there's a bombshell in Donald Trump's taxes," said the former Republican nominee Mitt Romney.