The View: Michael Bloomberg takes GOP, Trump to task The former New York Mayor is rumored to run for President in 2020 as a Democrat.

Michael Bloomberg, the former New York Mayor who is mulling running as a Democrat in the 2020 presidential election cycle, said Monday the GOP is suffering the consequences of unconditionally supporting an unpopular president.

“The Republicans did not exercise the check and balance on the White House that the constitution calls for,” Bloomberg said on ABC’s The View.

Bloomberg promoted his documentary “Paris to Pittsburgh,” about the United State’s withdrawal from the Paris Agreement's efforts to combat climate change and blasted what he sees as the Trump administration's rolling back of progress in addressing the issue.

“How can you look out the window and see all the wildfires,” among other occurrences, and still believe that “nothing is changing?” he said.

Bloomberg announced in October that he re-registered as a Democrat after being an Independent and, before that, a Republican. Last week the billionaire reportedly held meetings with top Iowa Democrats during a multi-city tour through the first state that has a say in a presidential race.

President Donald Trump mocked Bloomberg’s presidential ambitions in the New York Post last month, dismissing the former mayor with a derisive nickname.

“I’d love to run against Little Michael,” Trump told the Post. “I’d love to run against Michael. He’s been fighting me hard. He spent $100 million against me – that didn’t work. He spent a lot of money last night against Cindy Hyde-Smith. That didn’t work out so well.”

After the fellow billionaire criticized Trump’s business credentials at the Democratic National Convention in 2016, Trump fired back on Twitter, saying Bloomberg’s final term as mayor was a “disaster.”

However, Trump and Bloomberg weren't always at odds. The president vocally supported the mayor’s administration, tweeting in 2012 that Bloomberg was “doing a great job.”

Bloomberg said Friday that he will make a decision regarding the presidential bid early next year.