On "Hannity" tonight, Frank Luntz spoke to a focus group of New Hampshire Republican voters and got participants' advice for Donald Trump heading into tomorrow's Fox News debate.

The responses were interesting and all over the map.

"Put a plan forward and stop criticizing John McCain," one participant said.

Others agreed that Trump should use the debate to provide details about his policies and platform.

Some people said it's too late for Trump to make a positive impression.

"Engage your brain before you shoot your mouth," a participant said.

"Go back to 'The Apprentice,'" another bluntly stated.

See all the responses in the "Hannity" clip above, plus find out what the focus group had to say about Ohio Gov. John Kasich and Florida Sen. Marco Rubio.

Don't miss the Fox News-Facebook Republican debate, Thursday Aug. 6, live from Cleveland at 8:50p ET, moderated by Megyn Kelly, Bret Baier and Chris Wallace.

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