The senator said that the race for the nomination is far from over.
"We're going the distance," Trump rival Ted Cruz said on ABC's "This Week."
El conductor explicó por qué se unió a la campaña del político
The results echo complaints from Republican front-runner Donald Trump and Democratic challenger Bernie Sanders that the system is stacked against them in favor of candidates with close ties to their parties.
Trump was assured of collecting more than 50 delegates in Pennsylvania, Maryland and Connecticut.
They want to deprive him of delegates.
Trump stressed that he expects to win the number of delegates needed to land the nomination on the first ballot at July's national convention.
Precandidato demócrata participa en foro en el Vaticano, con los presidentes de Bolivia y Ecuador
He said that youth around the world are no longer satisfied with the status quo.
Bernie Sanders won the Wyoming caucuses on Saturday