to quote wikipedia:
The Republican-led SC House of Representatives overrode 105 of Sanford's 106 budget vetoes on May 26, 2004. The following day, Sanford brought live pigs into the House chamber as a visual protest against "pork projects".
He gave SC congress hell for many years, but no investigations.
oh, Mark Sanford I can't wait until the day he leaves office
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We shall embody in our lives the truths that make for finer womanhood.
I really think this varies a lot by state. Certainly, Michigan has had it's fair share of politicians who should be under ethics investigations but it's never happened in my politically aware lifetime (since mid 70's or so).