Former House Speaker Newt Gingrich (R-Ga.) said Sunday that the critical evidence in the Trump-Russia investigation implicates Democrats rather than Republicans

Gingrich said that "all of the real evidence" of money being exchanged or purchasing of influence points to Democrats.

Americans should know what Russia is up to, he said, adding that it is "ironic" that Democrats are pressing for probes of Trump associates while failing to look within.

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He said one of the Podesta brothers is a registered agent for a Russian bank. John Podesta was Hillary Clinton's campaign chairman.

"There's no evidence that anybody was particularly being purchased on the Republican side. [The investigation should] be about the degree to which the U.S. is penetrated with efforts to corrupt our society and to purchase influence," Gingrich said.

He added that anyone called to testify in the Congressional investigations should plead the Fifth unless granted immunity.

He pointed to what he called an independent counsel's attempt to "destroy Scooter Libby" during the Valerie Plame investigation.

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