Rivals Pound Trump over KKK, Taxes Ahead of Super Tuesday

The countdown is on to Super Tuesday, with 11 states up for grabs. The pressure has presidential candidates throwing even harder punches in the fight to secure votes.

But most blows are still aimed at the Republican frontrunner Donald Trump, with Sens. Marco Rubio and Ted Cruz pressuring him to release his tax records.

"We're putting these out today to put pressure on Trump and the other candidates to release theirs," Rubio campaign spokesman Alex Conant said.

"Maybe his tax returns show that he doesn't have quite as much money as he says he does," Cruz said.

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Trump is leading in most states and secured his first Senate endorsement from Sen. Jefferson Sessions, R-Ala.

"At this time in American history we need to make America great again," Sessions told Trump supporters Sunday. "A movement is afoot that must not fade away."

But Trump spent much of Sunday answering questions about a controversial endorsement from former Klu Klux Klan Grand Wizard David Duke.

"Honestly, I don't know David Duke. I don't believe I've ever met him.... just don't know anything about him," Trump later disavowed the endorsement.

But that didn't stop the political shots from being fired at him from fellow Republicans as well as Democrats.

"This is really sad, Donald Trump. You're better than this. We should all agree racism is wrong. The KKK is abhorrent," Cruz said.

"What has he done now? Saying that he would not disavow the KKK and David Duke because he didn't know who David Duke was? Oh, that's pathetic," Hillary Clinton said.

On the Democratic side, Clinton has more delegates and more momentum than Bernie Sanders after her weekend victory in the South Carolina primary.

The victory is being credited in large part to the African-American turnout. Sanders knows his fight to win is now even harder.

"We got decimated, George. We got decimated," Sander's told ABC's "This Week" host George Stephanopoulos.

Texas, Georgia, and Virginia now stand as the biggest opportunities for Clinton to dominate among African-American voters – and to test Sanders' strength among Hispanics.

With so many states up for grabs, the outcome of both parties' race for the presidential nomination could become a lot clearer after Tuesday.