Trying to reset his campaign after a particularly rough stretch, Donald Trump delivered one of the most detailed policy speeches of his campaign so far, rolling out his economic agenda. But it did little to stop dozens of prominent Republicans from going public with their disapproval of his campaign. Grace Rauh filed the following report.

After a week in which Donald Trump railed against a Muslim-American couple whose Army son was killed in Iraq, his campaign was eager to change the subject.

The Republican nominee laid out his economic plan for the country. He called for lowering income taxes across the board and reducing the number of federal income tax brackets from seven to three.

"For many American workers, their tax rate will be zero," Trump said.

Trump says parents should be able to deduct child care expenses from their taxes. It's a change that would overwhelmingly benefit wealthier families. And he called for ending the estate tax or so-called "death tax." That, too, would offer relief for the rich, because the tax only applies to estates worth more than $5.5 million.

"His tax plans will give super big tax breaks to large corporations and the really wealthy. Just like him and the guys who wrote the speech, right?" said Hillary Clinton, the Democratic candidate for president.

More broadly, though, Trump tried to frame the race as a choice between the past and a change-agent of the future.

"The other party has reached backwards into the past to choose a nominee from yesterday who offers only the rhetoric of yesterday and the policies of yesterday," Trump said.

But 50 foreign policy experts who are also Republicans are not embracing the change Trump is selling. They signed an open letter Monday, first reported by the New York Times. They said, "None of us will vote for Donald Trump." They wrote that he is "not qualified to be president and commander-in-chief" and would be a "dangerous President."

The national security officials who signed the letter did not endorse Hillary Clinton or say they would vote for her. In fact, they acknowledged that many of them have doubts about the Democratic nominee.