In the wake of Saturday's terror attack in London, President Donald Trump is pushing his travel ban.

President Trump took to Twitter early Monday morning saying, "The Justice [Department] should ask for an expedited hearing of the watered down Travel Ban before the Supreme Court seek much tougher version!"

The travel ban blocks people from six Muslim-majority countries from entering the U.S.

On Monday, the President went on to write, "People, the lawyers and the courts can call it whatever they want, but I am calling it what we need and what it is, a TRAVEL BAN!"

After the London attack on Saturday, the President tweeted:

"We need to be smart, vigilant and tough. We need the courts to give us back our rights. We need the Travel Ban as an extra level of safety!"

Seven people were killed and dozens of other injured. Early Sunday morning the President wrote, "We must stop being politically correct and get down to the business of security for our people. If we don't get smart it will only get worse."

It's unclear if the Supreme Court will allow the ban to go into effect immediately, before the justices even have the opportunity to hear arguments.