Proposed relocations such as Pfizer's trigger congressional response.

House Ways and Means approves $310 billion of tax benefits after squabble.

House Ways and Means approves $310 billion of tax benefits after squabble.

House Ways and Means Committee members weigh budget impact of extending breaks.

House Ways and Means Committee members weigh budget impact of extending breaks.

Benefits for corporate research and international finance operations are included in Senate plan.

Benefits for corporate research and international finance operations are included in Senate plan.

Swiss move helped the company avoid paying $2.4 billion in U.S. taxes, according to report.