Donald Trump Calls Comparisons to Adolf Hitler 'Terrible'

Donald Trump joined ABC News' George Stephanopoulos on "Good Morning America."

Trump has also asked his supporters at rallies to raise their hands to pledge to vote for him, which some have compared to a Nazi salute.

When asked whether such comparisons signal that he should tone down his rhetoric, Trump said "maybe so," but added that he continues to see strong support in recent polling and at the ballot box.

Trump also pushed back against GOP establishment efforts to block him from the nomination.

"I guess he disagrees with what I’m saying, but a lot of people agree with what I’m saying," he said.