GRAND RAPIDS, Mich. — Former President Donald Trump swept Michigan’s complicated and chaotic Republican convention caucuses in dominant fashion here Saturday, according to an NBC News projection. Trump won overwhelming majorities in each of the state’s 13 congressional districts — collecting 100% of the vote in four and more than 90% in nearly all of the others, according to unofficial numbers party officers reported in real time.Based on the results of today’s congressional district caucuses, Trump won all 39 congressional district delegates. Michigan was a two-part nominating…