Why would a republican turn on Trump's deportation plan?

We need to send the military to help deal with the illegals and the radical leftists. A lot of those illegals are in the cartel and are gang members, but the woke left is trying to protect them we need to kick them out. They put drugs on the streets that kill millions of Americans, loot stores, and hurt people.

Why would a republican turn on Trump's deportation plan?
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