DETROIT — Donald Trump on Monday called Eric Castiglia, the new leader of the Macomb County Republican Party, another demonstration of the former president’s interest in internal party races playing out this month within the Michigan GOP. “He knows what’s going on. He obviously does,” Castiglia said about Trump in a Tuesday interview. “He’s paying attention to what’s happening in the county.” Trump’s call came five days before the Michigan Republican Party’s Saturday state convention in Grand Rapids, where GOP delegates will endorse candidates for attorney general and secretary of state. Trump…
