In the last week Governor Scott Walker has stated he's for the 14th Amendment as currently (mis)interpreted, establishing birthright citizenship as the law of the land, for repealing birthright citizenship going forward, and against taking a position on the subject for now!
Scott Walker is a fish out of water, flopping on the pier.
CNN (justly) crucifies him for it, here.
On the merits of the issue Walker's flip-flops clearly show that he perceives the acceptable establishment view to be out of step with what he thinks the voters feel about it. Regular middle class folks with whom Walker identifies hate it that they're footing the bill for people who cut in line, go on government assistance and even commit crimes without serious consequences.
On the politics Walker looks unprofessional and unready for primetime, and when you get down to it, divided in his own mind about the issue.
The real Scott Walker has always been a little soft on illegal aliens but keeps changing his position because he senses voters aren't soft on them.
In view of his previously stated support for a pathway to citizenship, it's pretty obvious Walker has never had the fire in the belly on this subject which the Americans whose vote he's angling for possess.
And it's too late to do anything about it now.
He's done.
If he were wise he'd find a way to bow out, throw his support to Trump, and hope for a position in a Trump administration where he can do to government unions nationally what he's done to them in Wisconsin.