Democratic Pennsylvania Gov. Josh Shapiro couldn’t name “one policy difference” between Vice President Kamala Harris and President Joe Biden on Sunday, despite NBC host Kristen Welker giving him multiple opportunities to do so. Since becoming the Democratic presidential nominee, Harris has struggled to distance her campaign from her current role in Biden’s administration. On “Meet the Press,” Welker questioned Shapiro about whether he believes Harris has “done enough” to separate herself from Biden, given her recent failure to detail how her administration would be different. READ: CNN Can’t S…