The request follows Amazon making similar allegations of bias on the part of Lina Khan.
The UK's Competition and Markets Authority is concerned the companies haven't done enough to tackle the problem.
The bills are designed to curb the power of Apple, Amazon, Facebook, Google and other tech giants.
The speaker of the House says she told the Apple boss to express his concerns as Congress "works its will."
The European Commission is investigating whether Google gives itself an unfair advantage over competitors.
The legislation targets Silicon Valley's business practices.
Here's what you need to know about the latest attempt to rein in the power of Amazon, Apple, Facebook and Google.
Are customers losing out or paying more due to iOS and Android ruling the mobile playing field? That's what the CMA wants to find out.
The proposals, from a bipartisan group in the US House, target Big Tech's might with the most meaningful effort to reform competition laws in decades.
Apple says its control over the App Store promises security and reliability for users. Epic says it stifles competition.
The telecom giant is shifting gears back to what it probably should have been concentrating on in the first place.
The preliminary findings of an investigation triggered by Spotify say Apple's in-app payment policies are harming consumers and disadvantaging rival music streaming services.