Why a record number of wealthy Americans are renouncing U.S. citizenship

The number of Americans who have renounced their citizenship has more than tripled since last year to more than 6,000. But that record number may under estimate the count. CNBC’s Robert Frank reports. For access to live and exclusive video from CNBC subscribe to CNBC PRO: » Subscribe to CNBC TV: » Subscribe to CNBC: » Subscribe to CNBC Classic: Turn to CNBC TV for the latest stock market news and analysis. From market futures to live price updates CNBC is the leader in business news worldwide. The News with Shepard Smith is CNBC’s daily news podcast providing deep, non-partisan coverage and perspective on the day’s most important stories. Available to listen by 8:30pm ET / 5:30pm PT daily beginning September 30: Connect with CNBC News Online Get the latest news: http: