American Bar Association President James Silkenat wants to convince members of Congress this week that the leading tax reform proposals on Capitol Hill would harm not only law firms and lawyers but also the businesses and other clients who hire them.

Silkenat will join about 450 lawyers from across the country for the ABA’s annual lobbying push on Capitol Hill. A major focus will be spotlighting a tax reform provision that would fundamentally change how large firms report and pay taxes.