Zuckerberg, Bezos, Cook and Pichai antitrust hearing officially

Monday was set to be a historic day. Mark Zuckerberg, Jeff Bezos, Tim Cook and Sundar Pichai -- the CEOs of Facebook, Amazon, Apple and Google-owned Alphabet -- were scheduled to sit before the House Judiciary Subcommittee on Antitrust. However, the hearing is now officially postponed, according to the committee. Late on Thursday, a source familiar with the matter said the hearing was very likely to be delayed.

A scheduling conflict is to blame. The late John Lewis, a Democratic representative and civil rights leader who died last week of pancreatic cancer, will lie in state in the Capitol Rotunda on Monday

The meeting of tech giants was scheduled to take place at noon. A new date for the hearing has not yet been confirmed, the source had said. Axios earlier reported that the hearing would likely be delayed.

The House is scheduled to be in recess for all of August, so it's unclear if the hearing could get pushed back until after Labor Day.

Months in the making, the antitrust hearing aims to have four of the most powerful CEOs in tech defend accusations of monopolistic behaviors. All four tech giants have faced scrutiny over the past year from lawmakers and regulators, who not too long ago looked at Silicon Valley in a far more positive light. Now officials are raising concerns about these companies' growing dominance in the market, which could be squashing competition.