President Trump, chafing against news coverage he says is unfair, accused search-engine operator Google of suppressing positive stories about him and threatening a government response.

“This is a very serious serious situation — will be addressed,” he wrote on Twitter, the social media platform where he has more than 50 million followers. The president and congressional Republicans have all accused tech companies based in liberal-leaning Silicon Valley of suppressing news favorable to them, a claim that firm executives have denied in a number of hearings.