Im not so sure they want Perry as much as they want Kasich.
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Kasich has Perry beat by .8% in the last five polls shown on Real Clear Politics. Four of them have an 8/2 end date with one at 7/30. We should know something soon.
http://www.realclearpolitics.com/epolls/2016/president/us/2016_republican_presidential_nomination-3823.html
Fox debate participants