Donald Trump Elizabeth Warren WASHINGTON (Reuters) - Executives from Amazon.com Inc, Apple Inc, Facebook Inc and Alphabet's Google will testify before a House congressional committee next week in a hearing to discuss the tremendous market power wielded by online platforms. In a statement on Tuesday, the U.S. House of Representatives Judiciary Committee's antitrust subcommittee said witnesses would include Adam Cohen, director of economic policy at Google; Nate Sutton, associate general counsel for regulation at Amazon; Facebook's Matt Perault, head of global policy development and Apple vice president for corporate law Kyle Andeer. RELATED Kirsten Gillibrand TV ad hits Trump for 'broken promises' The hearing will be held July 16, the advisory said. Apple and Google did not respond to a request for comment. Amazon spokeswoman Jodi Seth said they will testify but did not share details. Facebook had no immediate comment. This comes as the House Judiciary Commi