People hold signs that read “Build That Wall” ahead of a Trump campaign rally on Feb. 12, 2016, in Tampa, Fla.

TAMPA, FL – FEBRUARY 12: People hold signs that read, ” Build that Wall”, as they wait for the start of a campaign rally for Republican presidential candidate Donald Trump at the University of South Florida Sun Dome on February 12, 2016 in Tampa, Florida. The process to select the next Democratic and Republican Presidential candidate continues. (Photo by Joe Raedle/Getty Images)