"He is the clear 'America First' candidate, and is as loyal and tough as they come," Trump wrote in December.
The race was called shortly after the former President concluded a victory speech following decisive wins in Alabama, Arkansas, Colorado, Maine, Massachusetts, Minnesota, North Carolina, Oklahoma, Tennessee, Texas, and Virginia.
"They call it Super Tuesday for a reason."
The race was called at 10:37 pm with 83 percent of the vote in.
Palmer has qualified for the presidential ballot in just 16 states.
The association, which has steered away from other America First candidates, has thrown its support behind Robinson after his win.
Donald Trump was declared the winner of the Minnesota GOP primary at 8:27 pm local time with two percent of the vote counted.
The vote win came in with about 43 percent of the vote in on Tuesday night a little after 9 p.m. EST
At the time the race was called, the former president was leading former South Carolina Governor Nikki Haley by 44.9 points.
Donald Trump was declared the winner of the Texas GOP primary by 75.4 percent with 745,014 votes total on Super Tuesday.
Trump was declared the winner with 2 percent of the vote counted.
The race was called at 8:45 pm, with one percent of the vote in.
The race was called at 8:28 pm, with one percent of the vote in.
The race was called at 7:16 pm local time with 5 percent of the vote in
The race was called at 8:08 pm with 2 percent of the vote counted.