I got that call this afternoon, just days after getting one from Rick Santorum urging a vote for Pensler. Clearly this is Pensler's play for the libertarian vote after the earlier play for the Catholic vote.
Pensler is counting on his expensive ad campaign overcoming Trump's endorsement of his challenger, John James, and on the fractured nature of Republican politics in Michigan to eek out a win, which is a phenomenon of its libertarian leanings.
And as everyone knows, libertarians are a contrary bunch who can hardly come to agreement about anything among themselves, let alone unite anyone around their views once in office. Pensler himself has alienated Polish-Americans with his holocaust remarks. He fits right in with the libertarians.
The right thing to do in this context is vote for John James.