Florida Sen. Marco Rubio dismissed a tweet by freshman Rep. Alexandria Ocasio-Cortez Tuesday, in which she deemed President Trump as racist.

Ahead of Trump's national address regarding the southern border, Ocasio-Cortez (D-N.Y.) tweeted that Trump being "racist" should make people "uncomfortable."

Rubio called the Democrat's comments "outrageous talk" on "The Story" and said that type of rhetoric is used to gain fame.

"I'm here to make a difference and to pass law and to do serious stuff," he said. "People that oppose [a border wall] are basically saying 'yes, we want to have immigration laws but we don't want you to enforce them.'"

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He added that the biggest threat to legal immigration is, in fact, illegal immigration.

"They know, in practical terms, what they are advocating is that anyone who comes here gets to stay here," Rubio said. "How's that good for anyone?"

Amid speculation that Trump may need to negotiate on Dreamers in order to secure border wall funding, Rubio said the president has already gone "above and beyond."

He noted that Trump previously offered a provision to DACA recipients for legal status.

"Even that was not enough for the Democrats," Rubio said.

Watch more of Rubio's discussion with Martha MacCallum above.

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