New Year, Same Donald: Trump Launches Twitter Tirade Against Chicago Mayor, Obamacare, Media

Longtime Trump nemesis Rosie O'Donnell was among those firing back at the president-elect.

Just three days into 2017 and less than three weeks before Donald Trump takes office, the president-elect took to Twitter to launch his feelings on everything from Chicago violence to repealing Obamacare and international diplomacy.

Read: Donald Trump Takes First-Ever Trip to the White House, Meets With President Obama

On Monday, Trump tweeted: “North Korea just stated that it is in the final stages of developing a nuclear weapon capable of reaching parts of the U.S. It won't happen!”

He also took aim at the city of Chicago's soaring murder rate, targeting the Windy City's mayor and former chief of staff to President Obama, Rahm Emanuel.

He also blasted the media’s bias against him during the election.

On Tuesday, the attacks continued as he slammed General Motors for sending jobs across the border to Mexico.

Since Trump's tweet, General Motors hit back at the president-elect in a statement, saying: "GM builds the Chevrolet Cruze hatchback for global markets in Mexico, with a small number sold in the U.S."

Trump also lambasted Obamacare.

On Monday, House Republicans voted to gut the Independent Ethics Office, a move Trump expressed his disapproval of on Tuesday morning.

Read: Tempers Flare Over Tenor: Andrea Bocelli Reportedly Bails on Trump Inauguration Over Backlash

His longtime foe, Rosie O’Donnell, launched her own Twitter attack on the president-elect, posting, “Donald Trump unfit to be president” and “less than 3 weeks to stop him, America."

The president-elect celebrated the New Year at a formal bash at Mar-A-Lago, in Palm Beach, Florida.

Watch: Fighting City Hall: Donald's Aides Feud with NYC Mayor's Office After Trump Tower Evacuation