Jeff Sessions of Alabama became the first sitting U.S. senator to endorse Donald Trump on Sunday, NBC News reported.
Wearing "Make America Great Again" hat, Sessions told the crowd that he was throwing his support behind this "movement" because, in his best estimation, "at this time in America's history, we need to make America great again!"
Sessions' endorsement comes after New Jersey Gov. Chris Christie endorsed the real estate mogul.
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"I'm becoming mainstream. All these people are now endorsing me," Trump told the sprawling Alabama crowd. "When I get Jeff Sessions, that means a lot to me. That means a lot. That's a biggie, especially since he's never done it before."
Sessions was an adviser in crafting the Trump's immigration policy plan and the two met on Capitol Hill in September joined by Sarah Palin.