Gov. Rick Perry wasn't a legitimate presidential candidate for 2012 and he's still not for 2016. The only reason his name is even in the headlines these days is because he's using this illegal alien border crossing issue as a means to get his name back in lights. He has no credibility, IMO. I mean, he wants the illegal alien crossing to stop yet the very educational benefits his state provides to illegal Mexicans is, in part, why they across the border. Not a big part, but still it acts as a magnet for illegal Mexicans to come into Texas to gain the education they see as part of living "the American Dream".
Of course, he'll say he's only following federal law, but it's a cop-out.