Trump also wins the Republican primary in Michigan. US President Joe Biden received not entirely clear support from the Democrats with around 80 percent of the vote.

Trump is far ahead of Haley in internal party polls among Republicans. The question will be how many of these Haley supporters will end up voting for Trump in the November presidential election if he runs. Some of them do not rule out even voting for Biden to prevent Trump from having a second term. But if this group doesn't vote or supports a third, independent candidate, that could become a big problem for Trump.