Brendan: Could I borrow your phone, please? wellbutrin sr 100 mg weight loss The wealthiest lawmaker of all is Rep. Darrell Issa, R-Calif., whose net worth totaled $355.4 million in 2012. Issa also serves as Washington's top watchdog, chairing the House Oversight and Government Reform Committee. Rounding out the top 10 list were seven Democrats, four senators, and one woman.