Donald Trump's verdict on his first meeting with President Barack Obama?

"Really good meeting, great chemistry," he tweeted late Thursday.

There is no love lost between the pair.

Trump kept the birther movement going long after the president released his birth certificate. In August 2012, Trump he tweeted that an "extremely credible source" called his office and said Obama's "birth certificate is a fraud."  And in Sept. 2014, he called on internet hackers to find Obama's college records to "check 'place of birth.'"

During the campaign, Obama told Trump to "stop whining." Last month, he also slammed the Republican's "unbelievable rhetoric." Speaking on Oct. 9, Obama said: "Demeaning women, degrading women, but also minorities, immigrants, people of other faiths, mocking the disabled, insulting our troops, insulting our veterans —that tells you a couple of things. That tells you that he's insecure enough that he pumps himself up by putting other people down, not a character trait that I would advise for someone in the Oval Office."

Trump has threatened to undo much of Obama's policies and programs. At stake is the president's legacy on health care initiatives, immigration, a global climate change pact and a nuclear deal with Iran.