WASHINGTON (NEXSTAR) - A federal judge blocked President Donald Trump's executive order ending birthright citizenship on Thursday, calling the order "blatantly unconstitutional."  "Obviously we're going to appeal it," President Trump said in the Oval Office.  President Trump signed the order his first day in office. The order wouldn't have automatically given citizenship to children with a parent in the country illegally.  The Pew Research Center said, in 2016, about 250,000 babies were born with parents in the country illegally, about 6% of all U.S. births.  Rep. Brian Babin (R-Texas.) filed legislation this week, also ending birthright citizenship. He said it would automatically grant citizenship only to babies with a parent who is a citizen of the U.S., a permanent resident, or a lawful immigrant in the U.S. Armed Forces.  Those that desire to be a United States citizen must do it legally," said Rep. Dale Strong (R-Ala.). "You must assimilate, pledge allegiance to America, follow our laws and speak our language."  Rep. Babin said he welcomes the court fight, believing the U.S. Supreme Court may rule in their favor.  "We wanted the ACLU and the 22 states [to sue]," Babin said. "Why? So we can get it to the Supreme Court of the United States."  Opponents of ending birthright citizenship said the 14th Amendment guarantees citizenship to people "born and naturalized in the U.S."  "I think some people need to just sit down and read the damn constitution," said Rep. Sylvia Garcia (D-Texas.). "Frankly, if you just read it, there is no question. The founders were crystal clear."  22 states and the ACLU are challenging the executive order.