Christopher Arneson, Senior Tax Policy Advisor, U.S. Senate Finance Committee Majority Staff Christopher Arneson is senior tax policy advisor with the U.S. Senate Finance Committee Majority Staff, where he has served for more than a decade, under Chairman Wyden, and previously, Chairman Baucus. He has primary responsibility on the Finance Committee staff for issues including tax exempt organizations, estate and gift tax, income tax accounting, and various special industry issues.