U.S. President Donald Trump has vowed a major crackdown on what he calls the “birth tourism” business, saying his administration will enforce restrictions more forcefully. Speaking to reporters, Trump claimed that hundreds of thousands of people take advantage of birthright citizenship by coming to the U.S. to have children. He described birth tourism as a growing business and argued that birthright citizenship was never intended for wealthy families travelling to the country to secure citizenship for their children. Trump also criticised a Supreme Court decision that he said prevented his administration from ending birthright citizenship through executive action. The remarks come as his administration pushes tougher measures on birth tourism and immigration. Watch the full video for Trump's comments and his latest stance on birthright citizenship and enforcement.