US President Donald Trump temporarily suspended the issuance of new work visas for certain foreign workers yesterday, a move widely opposed by business groups. Trump’s presidential proclamation bars most H-1B visas for skilled employees as well as H-2B seasonal worker visas. It also restricts some H-4, J-1, and L-1 visas. Tech companies like Amazon, Google and Twitter, who rely heavily on the H-1B visas, are objecting to the directive.

The White House said the move would help the economy rebound amid the coronavirus crisis and that targeted visa categories pose “a risk of displacing and disadvantaging United States workers during the current recovery.” Critics argue the order is part of the Trump administration’s broader efforts to curb immigration.

The visa suspension, which exempts those already in the US and visa holders abroad, as well as some agricultural, health care and food industry workers, takes effect Wednesday and lasts until the end of the year.