The altercation in Wisconsin is the latest in a series of confrontations at recent Trump events.
President 2016
Republicans stay silent as Trump sounds off on abortion
The presidential candidate says any abortion ban should carry punishment for women, then backs off the statement later.
A Sanders win in Wisconsin would put pressure on Clinton
The contenders for the Democratic presidential nomination also take the fight to New York, where both have high hopes.
Republicans in race won’t commit to backing nominee
Early in the campaign Donald Trump, Ted Cruz and John Kasich indicated they would support the eventual nominee.
Trump campaign manager charged with battery
The Republican presidential candidate says he’ll stand by Corey Lewandowski and criticizes the young female reporter who told police she ended up with bruises from the encounter.
Walker endorses Cruz as candidates converge on Wisconsin
Donald Trump plans his first Wisconsin campaign stop in House Speaker Paul Ryan’s hometown.
Donald Trump, Ted Cruz continue public feud on Sunday shows
A recent poll shows 60 percent of Republican primary voters are embarrassed for the party.
Bernie Sanders wins 3 weekend caucuses
But Hillary Clinton still holds a lead of more than 260 pledged delegates to the Democratic nominating convention.
Presidential primary brings Arizona sheriff back into spotlight
Donald Trump invoked Joe Arpaio’s name in his calls for tougher immigration enforcement, while Democratic candidates called his tactics disrespectful.
Sanders wins Democratic presidential caucuses in Washington, Alaska
The Vermont senator is trying to build support among liberal activists into a three-state sweep on Saturday.