None of them are going to want to follow his lead, only because he did it first, and he made them all look bad.
Still, you're probably right about the pickle DC will be in if any other candidates want to get a tour of the border by the Border Patrol. At this point, they'd have to do the same thing to Hillary, if she wanted to do it, or the sheer scale of hypocrisy would damage them in the voters' eyes.
I’ve personally accompanied a presidential candidate, Alan Keyes, on a tour put on by the Border Patrol. It was in 2008.
That’s genius.