MILWAUKEE — After Donald Trump’s toughest stretch of the campaign, he and Ted Cruz made spirited final pitches Monday to Wisconsin voters, who will cast ballots Tuesday in a Republican primary that both consider a key step in the race for president. After Tuesday, there’s a two-week lull before the next important voting, in New York. Trump is facing pressure on multiple fronts following a difficult week marked by his controversial comments, reversals and rare moments of contrition.