AMES, Iowa — Conservative television personality Glenn Beck on Saturday joined Sen. Ted Cruz as the GOP presidential candidate sweeps through Iowa to make his final case ahead of Monday's crucial vote.

In introducing Cruz, Beck called him, "the first Hispanic president of the United States."

Beck gave a passionate speech making the case for Cruz as a committed defender of constitutional principles that conservatives could trust, drawing a contrast with the dealmaker Donald Trump.

In the closing days of the Iowa campaign, Cruz finds himself in a tight race with Trump. Though Trump has generally appealed to a more eclectic group of voters who aren't necessarily conservatives, there still may be enough conservatives undecided among the candidates to swing the race .

At the same time, Cruz is trying to prevent Sen. Marco Rubio, who tends to place in third place in polls, from nibbling away at his support.