Vermont Sen. Bernie Sanders has renewed his calls for the current Democratic National Committee chairwoman to resign in the wake of leaked DNC emails that reveal top party officials had actively worked against him in the primary process.

"I asked and demanded Debbie Wasserman Schultz's resignation many, many months ago and I state that again," the 74-year-old socialist told CNN's Jake Tapper on Sunday.

"I don't think she is qualified to be the chair of the DNC, not only for these awful emails, which revealed the prejudice against me, but also because we need a party that reaches out to working people and young people, and I don't think her leadership style is doing that," Sanders added.

The Vermont senator also said it was "an outrage and sad [to see] people in important positions in the DNC trying to undermine my campaign."

"It goes without saying that the function of the DNC is supposed to represent all candidates and be fair and open minded," Sanders said.

Sanders also used an appearance on ABC's "This Week" to make his case against Wasserman Schultz.

"I think she should resign, period," Sanders told host George Stephanopoulos. "I think I told you a long time ago that the DNC was not running a fair operation, that they were supporting Secretary Clinton, so what I suggested to be true six months ago turns out to be true. I'm not shocked."

The Democratic socialist said the party needs a new leader that will include others and unite all liberals and progressives.

"I think these emails reiterate why she should not be chair," Sanders said.

Sanders called the collision of the Democratic convention and currently unfolding email scandal a "very momentous moment in American history."