MADISON, Wis. — As expected, President Biden and ex-President Trump won their respective Democratic and Republican primaries in Wisconsin. Biden won 88% of the Democratic vote to strengthen his claim for delegates toward his nomination at the party’s national convention in Chicago. There was, however, a significant crack in support for Biden: 8% of Democrats withheld instructions to their delegates. This, said political analysts, symbolized concern about Israeli excesses in the Gaza war that Biden has failed to curb. Trump, although winning 79% in the GOP primary, also experienced less than unified support. Some 12% of Republican voters went instead for Nikki Haley, former U.S. ambassador to the United Nations, even though she had dropped out.