A week before the primary, a poll run by Marquette University Law School showed Donald Trump lagging Ted Cruz by about 10 points.
President 2016
Cruz jokes about backing car over Trump on Jimmy Kimmel show
The remark is made in reference to a joke made earlier in the show.
Police seek suspect who pepper-sprayed teen at Trump rally
The altercation in Wisconsin is the latest in a series of confrontations at recent Trump events.
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.
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 three states; Clinton retains big delegate lead
Bernie Sanders wins three Western caucus contests – Washington, Alaska and Hawaii.
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.