Not sure if he is a plant; would certainly make sense. What he is for sure is a total disgrace:
"Quickly becoming CNN’s favorite Republican, Congressman Justin Amash (R-MI) is now defending illegal aliens’ right to vote. He’s been long thought of as a Libertarian leader but at this point it seems he’s probably sliding to the far left on some key issues. This NeverTrumper had a defense for his vote against a resolution that supported voter integrity."
insidescooppolitics.com/2019/03/11/quickly-becoming-cnns-favorite-republican-congressman-justin-amash-r-mi-is-now-defending-illegal-aliens-right-to-vote-hes-been-long-thought-of-as-a-libertarian-leader-but-at-this-point-it-se/