Counting Down to Super Tuesday

(NBC News) Voters in 12 states could reshape the presidential race when they head to the polls tomorrow for the "Super Tuesday" primaries.

Donald Trump heads into Super Tuesday with his first Senate endorsement, Alabama Senator Jeff Sessions.

With Trump leading every Super Tuesday state except Texas, his opponents are hitting hard.

Trump is being called a racist after failing to immediately disavow an endorsement from by former Ku Klux Klan leader David Duke.

"Friends do not let friends vote for con jobs," Senator Marco Rubio told supporters over the weekend, prompting a quick response from Trump.

Senator Ted Cruz is leading his home state of Texas, and slamming Trump for not condemning support from the former head of the Ku Klux Klan.

"We should all be united in saying that the Klan is reprehensible and has no place in politics," Rubio said.

Trump blamed the incident on a faulty earpiece, claiming he couldn’t hear the questions.

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