Republican presidential candidate Donald Trump speaks during a primary night news conference, Tuesday, May 3, 2016, in New York. (AP Photo/Mary Altaffer)
The decision comes a day after Trump's only other rival, Ted Cruz, left the 2016 contest
READ MOREIn this Feb. 16, 2016, file photo, Lonnie Franklin Jr., left, appears in Los Angeles Superior Court for opening statements in his trial in Los Angeles. The “Grim Sleeper” serial killer trial is coming to a close in Los Angeles after months of testimony. Closing arguments were scheduled to begin Monday, May 2, 2016, in the trial of Franklin. He’s charged with killing nine women and a 15-year-old girl between 1985 and 2007. They were shot or strangled and their bodies dumped in alleys and trash bins in South Los Angeles and nearby areas. (Al Seib/Los Angeles Times via AP, Pool, File)
Lonnie Franklin Jr., 63, faces the death penalty if convicted of killing nine women and a 15-year-old girl between 1985 and 2007
READ MOREYells of cheating as Cruz takes most AZ votes
READ MOREPolls show white men less likely to vote for Hillary; more women dislike Trump
READ MOREWatch Larry Wilmore and the president speak at the dinner
READ MOREMeek told prosecutors that Dylann Roof planned the Charleston church mass killing for more than six months
READ MORERepublican presidential candidate, Donald Trump, campaigns during a rally on Monday, April 25, 2016, in Wilkes-Barre, Pa. (Jake Danna Stevens/The Times-Tribune via AP)
Trump, Clinton hope to win primaries in Connecticut, Delaware, Maryland, Pennsylvania and Rhode Island on Tuesday
READ MOREIn this March 9, 2016 file photo, Attorney General Loretta Lynch testifies on Capitol Hill in Washington, before the Senate Judiciary Committee. Lynch is urging the nation's governors to make it easier for convicted felons to obtain state-issued identification after they get out of prison, part of a broader plan being announced Monday to help smooth the path for state and federal inmates who are preparing to re-enter society. (AP Photo/Andrew Harnik)
Attorney General Loretta Lynch announce a set of measures aimed at helping inmates return to society
READ MOREIn this Nov. 25, 2014, file photo, demonstrators block Public Square in Cleveland, during a protest over the police shooting of Tamir Rice. The city of Cleveland has reached a settlement Monday, April 25, 2016, in a lawsuit over the death of Rice, a black boy shot by a white police officer while playing with a pellet gun. (AP Photo/Tony Dejak, File)
There was no admission of wrongdoing in the settlement over the death of Tamir Rice
READ MOREProsecutor says more charges coming: "I can guarantee you"
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