This article States what I’ve been talking about for months now. The travel ban has cut off a significant number of high Tech workers. The industry is suffering because of it. This stunts growth, exactly the same growth that the trump administration is relying on to pay for the tax cuts.
Without this growth the United States is going to suffer a significant tax revenue shortfall. Additionally low Tech workers have been cut off due to Trump cracking down on immigration, and add the deportation of undocumented workers which whom perform a lot of work in agriculture, hospitality, and many other jobs that most Americans refused to do.
Silicon Valley reeling as Trump chokes off a critical source of talent – https://www.cnbc.com/2018/03/15/silicon-valley-reeling-as-trump-chokes-off-critical-tech-talent.html