Massive Google antitrust probe will expand into search and Android businesses

The 50 attorneys general investigating Google are preparing to expand their antitrust probe beyond the company's advertising business to dive more deeply into its search and Android businesses, people familiar with the matter tell CNBC.

The development comes as politicians on both sides of the aisle, including President Donald Trump, increasingly tee off on Silicon Valley. Meanwhile, Democratic presidential candidate Sen. Elizabeth Warren has called for Big Tech companies to be broken up.

The attorneys general – who represent 48 states, Puerto Rico and Washington, D.C. – will write up subpoenas known as civil investigative demands, or CIDs, to support the inquiries, the people said. One of the people cautioned that the subpoenas may not be served imminently.

So far, the investigation has explicitly focused on Google's advertising business.

More