Donald Trump said Wednesday that he doesn't expect every key Republican leader to back him in his bid to win the White House, and said he doesn't want everyone's support after how they treated him in the campaign.

"I am confident I can unite much of it, some of it I don't want," Trump said during a "Today" show interview Wednesday morning. "There were statements were about me that those people can go away and come back in eight years after we serve two terms. Honestly there's some people I really don't want, I don't think it's necessary. There will be people voting for me, not necessarily voting for the party."

The candidate's comments come after his Tuesday night win in the Indiana primary, after which he became the "presumptive nominee" of the Republican Party, and should gather enough delegates to become the nominee in the coming weeks.

Shortly after Trump's landslide win in the Hoosier state, his main opponent Ted Cruz dropped out of the race. Trump said he was "surprised" by Cruz's announcement and "did not expect it," but said he hopes Cruz will support him going forward.

"I don't know, you know I hope so. It would be nice in Ted's case, in other cases I don't care. In Ted's case it would be nice, as you know we had a very good relationship for quite a long time," Trump said of his former opponent.

Regardless of the support he receives from his fellow Republicans, Trump remains confident he will do well in a November general election.

"We can do really well against Hillary," he said. "She is a disaster and will be a disaster as a president."