Congress’s Big Tech Crackdown Quickens With Rare Show of Unity

A bipartisan group of lawmakers defended a bill to rein in big technology companies, signaling that momentum is building for the first major piece of legislation to curb the power of giant online platforms.

Senators Amy Klobuchar and Chuck Grassley and Representatives David Cicilline and Ken Buck in a Wednesday press conference addressed concerns brought up by tech groups and their supporters about a measure that would prohibit companies like Apple Inc., Amazon.com Inc., Alphabet Inc.’s Google, Microsoft Corp. and Facebook parent Meta Platforms Inc. from favoring their own products over those of competitors.

“For too long, ...