Republican frontrunner Donald Trump won every county in Pennsylvania, Delaware, Maryland, Connecticut and Rhode Island in what some considered to be another super Tuesday.
Trump now has 949 pledged delegates, compared to 544 for Cruz and 153 for Kasich.
The Republican candidates will set their eyes on Indiana, which votes next Tuesday, for a mostly winner-take-all state with 57 delegates. A win for Trump would only propel him closer to the 1,237 delegate count needed to leave no doubt that he is indeed the Republican nominee.