Donald Trump briefly turned his fire away from Hillary Clinton Wednesday and blasted those who let her 'get away' with what he described as crimes related to her emails scandal.

Trump hit his Democratic presidential rival again and again in a rally in Council Bluffs Iowa Wednesday, linking her scandal, trade deals, and Wall Street donors into a single narrative – but he also went after those who failed to make her pay for it.

'And I’m so disappointed with the people in Washington for allowing her to get away with this. I’m so disappointed,' Trump said.

'B oth sides, by the way,' Trump added, meaning Democrats and Republicans, or perhaps even including FBI investigators.

'I am so disappointed when they say there’s nothing they can do,' Trump said.

Republican presidential candidate Donald Trump said in Iowa Wednesday that he was 'so disappointed' with people who allowed Hillary Clinton to 'get away' with what she did with her private emails

Trump said Clinton lied to Congress under oath about turning over her work-related emails during testimony and got away with it – something that would constitute a crime.

'I don’t think they tried too hard to get 'em, do you? I don’t think they tried too hard,' Trump said, in reference to Clinton's emails, to shouts of approval from the crowd.

Some members of House Oversight Committee have said Clinton committed perjury during testimony and have written letters to the FBI about it. FBI Director James Comey this summer said that while Clinton was extremely careless in handling her emails, no prosecutor in the country would pursue the case.

Then Trump turned to an array of 'special interests' he said controlled the Clintons.

Donald Trump campaigned in Chicago Wednesday morning before flying to Council Bluffs, Iowa for a campaign rally

'Follow the money,' he urged the crowd repeatedly, using a line that was central to the Watergate story. 'She’s there for one reason and that’s to protect her donors and special interests.'

'The Clintons have perfected the politics of profit,' Trump said. 'I think it has more to do with other things. Large corporations who support terrible trade deals and offshore jobs and they’re donating to the Clintons,' Trump said.

Trump questioned why five people, including 'ring leaders' as well as the man who designed her private email server, got immunity deals from the FBI.

And he blasted the individuals who refused to testify by invoking their constitutional right against self-incrimination, and compared the situation to mob trials.

'If you’re innocent why are you taking the Fifth Amendment?' he asked.

He threw corporate media into the mix.

FOLLOW THE MONEY: Trump mentioned Wall Street donors, bad trade deals, the Clintons, corporate media, and those who allowed Clinton to 'get away' with her email scandal in an Iowa rally speech that tried to frame how the Clintons do business

He hit Clinton on her email scandal again and again – as he failed to do at Monday night's presidential debate, saying Clinton 'lies to Congress under oath about turning over her work related emails.

Trump, who regularly bashes 'stupid' politicians, spoke in more ominous tones, suggesting bad trade deals got struck deliberately.

'How many more Clinton scandals can this country take?' Trump asked.

Trump cited online polls that had him winning the debate against Hillary Clinton, saying 'hundreds of thousands' of votes were cast. 'But when they poll 300 people, that means a lot,' he said, dismissing traditional polls like CNN that had him losing.

Before Trump spoke, Iowa national committeeman Steve Scheffler told the crowd, 'As you know Hillary is an evil pathological woman.'

Trump spoke to more than a thousand people at the Mid America Center Convention Center in Council Bluffs, in western Iowa.

Trump with Polish Americans at the National Alliance in Chicago earlier Wednesday

Trump, who often calls politicians stupid, said to 'look at whose making contributions' to politicians to understand how bad deals get made

A large black curtain divided the room so that the crowd could pack into a smaller space.

Trump drew a bigger crowd when he visited the same facility during the winter.

There also were frequent mentions of religion at the rally, where the formation of Christian Conservatives for Trump got launched.

An opening prayer thanked God for Trump as well as running mate Mike Pence, as well as 'for the platform in the Republican Party.'