The Shake Shack chain has become synonymous with smashed burgers, crinkle-cut fries, and Martin's Potato Rolls. But the latter has become a cause for concern among customers after local Pennsylvania news site Billy Penn reported that the people behind the bun company have donated thousands of dollars to the front-running Republican candidate for Pennsylvania governor, Sen. Doug Mastriano. Mastriano is regarded as a far-right Republican and recently received President Trump's backing in the race for governor, according to NBC News. Billy Penn reported that he gained popularity as a Trump-supporting election denier with Christian nationalist beliefs. Mastriano was also subpoenaed...