The 10 biggest U.S. consulting firms to the federal government have offered to cut billions of dollars from their contracts with agencies but face pushback from the Trump administration to deliver even deeper savings.

Companies including Accenture, Booz Allen Hamilton, Deloitte, IBM and others met the General Services Administration deadline this week to justify their contracts and identify potential cost cuts to existing projects. Trump administration officials are expected to go back to some of the firms, demanding further price concessions or other revisions, according to people familiar with the review process.