Doug Mastriano, the Republican candidate for Pennsylvania governor, was reportedly registered to vote in New Jersey until last year, opening himself up to the kind of carpetbagger accusations that have dogged Dr. Mehmet Oz. The underdog GOP candidate grew up in the Garden State and voted in Jersey for 28 years until 2010, the New Jersey Globe reported. Mastriano, who claims the 2020 election was stolen from former President Donald Trump, remained registered and eligible to vote in New Jersey until notifying authorities that he was no longer living there in 2021. In the meantime, the staunch Tr…