Trump rescinds pledge to back GOP nominee; Walker backs Cruz

Republican presidential candidate Donald Trump reacts as he leaves a campaign stop Tuesday, March 29, 2016, in Janesville, Wis.
photo This March 24, 2016, photo shows Republican Presidential candidate U.S. Senator Ted Cruz making a stop at the Armory restaurant in downtown Janesville, Wis.

BROOKFIELD, Wis. - Donald Trump, turning his focus to Wisconsin even as another controversy cast a shadow over his campaign, said Tuesday he will no longer honor his pledge to support the eventual Republican pick for president. And his two Republican rivals, Texas Sen. Ted Cruz and Ohio Gov. John Kasich, also refused to say they would support Trump or whoever is the nominee.

All three Republicans appeared at a CNN town hall in Milwaukee one week before Wisconsin's April 5 primary.