President Donald Trump looked on following a swearing-in ceremony for Defense Secretary James Mattis at the Pentagon in Washington, D.C., Jan. 27, 2017. Reuters

Joaquin Castro has launched an all-out Twitter war against President Donald Trump – and he’s holding nothing back. The Democratic Texas congressman slammed the president Sunday for behaving like a "king" after Trump’s executive orders restricting travel from seven Muslim-majority nations was halted by multiple U.S. federal judges.

Castro responded to Trump's flurry of weekend tweets targeting the Brooklyn judge responsible for granting a temporary stay to visa and green card holders who had been detained in response to Trump’s travel orders. "@RealDonaldTrump It's called Judicial Review based on Separation of Powers in our Constitution," the congressman tweeted. "You're a president not a king."

Trump appeared furious online leading up to Super Bowl Sunday, venting his disdain for the U.S. court system and revealing to his 24 million Twitter followers that he was attempting to save his travel restrictions.

"Just cannot believe a judge would put our country in such peril," Trump tweeted Sunday. "If something happens blame him and court system. People pouring in. Bad!"

Trump's travel restrictions, signed Jan. 27, sent shockwaves across the nation when at least 100 people were detained at U.S. airports. The news sparked immediate protests and demonstrations that have lasted for weeks. Meanwhile, the courts have continued throwing major hurdles toward the White House’s orders. Democratic attorneys general were rallying against the restrictions and federal judges continued to place temporary roadblocks along the way.

U.S. District Court Judge James Robart, a President George W. Bush-appointee who temporarily blocked Trump’s orders, was expected to review legal briefs from both sides before making a permanent decision on whether to resume Trump's travel orders Monday.

When halting the executive orders, Robart wrote the states suing the federal government "have met their burden of demonstrating that they face immediate and irreparable injury as a result of the signing and implementation of the executive order."