"That's my country. That's my kids and grandkids," Bloomberg said of his reaction to McConnell's statement. "You have to make it work. We have an election — whoever wins, you got to get behind."
"He's our president, and we need this country to be run well. I didn't vote for him," Bloomberg added. "Let's just all hope that Donald Trump is a good president of the United States."
Also a businessman and philanthropist, Bloomberg said Americans should direct their energy toward changing the outcome of the next election rather than fighting the current administration.
He said people in other countries "try to tear down the government and have a revolution" when their candidate doesn't win but Americans should be more strategic.
"We should sit back and say, four years from now, how do I get my woman or man elected? And that's very different," he said.
But Bloomberg said people should still fight policies they don't agree with.
"You can protest. You can elect other officials, write letters, make phone calls," he said. "But in the end, the public has spoken, whether you like the results or not."
Bloomberg joked that Trump had "a little help from the Russians" in the 2016 election.
But he said "one thing" the congressional race, won by Republican Karen Handel, showed was that "all the money in the world can't buy an election."
"The public is a lot smarter than people give them credit for," Bloomberg said.
In the end, he said, it was Trump's "Make America great again" message that resonated with voters.
"I don't know what the 'again' means," Bloomberg added. "We're better today than we have ever been. Still, that's the key."