Democratic Sen. Dianne Feinstein said Sunday Congress needs to investigate whether former Attorney General Loretta Lynch gave cover to Hillary Clinton's campaign when she told former FBI Director James Comey to call the probe into Clinton's emails "a matter" instead of "an investigation."

"I think we need to know more about that," Feinstein said on CNN's "State of the Union." "And there's only one way to know about it, and that's to have the judiciary committee take a look at that."

Comey testified Thursday to Congress that Lynch's request made him feel "queasy."

Feinstein, the top Democrat on the committee, said she would have had "a queasy feeling, too."