Story highlights Each call was described as a cordial call of congratulations

Trump and the three men were at odds throughout the campaign

Washington (CNN) Donald Trump seems to be making amends with some of the establishment Republicans with whom he was at odds during his campaign

Within the last 24 hours, the President-elect has had phone conversations with 2012 Republican nominee Mitt Romney as well as primary rivals Ohio Gov. John Kasich and former Florida Gov. Jeb Bush, CNN has learned.

Each call was described to CNN as a cordial message of congratulations.

Trump confirmed the calls in a series of tweets on Sunday morning, calling calls from Romney and the Bushes "very nice!"

Mitt Romney called to congratulate me on the win. Very nice! — Donald J. Trump (@realDonaldTrump) November 13, 2016

Jeb Bush, George W and George H.W. all called to express their best wishes on the win. Very nice! — Donald J. Trump (@realDonaldTrump) November 13, 2016

Governor John Kasich of the GREAT, GREAT, GREAT State of Ohio called to congratulate me on the win. The people of Ohio were incredible! — Donald J. Trump (@realDonaldTrump) November 13, 2016

Months earlier, the three men comprised some of Trump's most outspoken Republican opponents, and Trump attacked each of them during the primary and during the general election.

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