Tommy Thompson's campaign says the Republican Senate candidate sold stock in four companies for $38,000 after learning they have ties to Iran.
Campaign spokeswoman Lisa Boothe says the companies included Royal Dutch Shell and Schlumberger.
Thompson first revealed the stock sale Thursday during a debate with U.S. Rep. Tammy Baldwin, his Democratic opponent. He said he doesn't tolerate doing business with Iran.
The sale represents a small fraction of Thompson's wealth. He told the Milwaukee Journal Sentinel he has at least $13 million in assets, plus more than $5 million in income since the start of 2010.
Thompson's campaign has criticized Baldwin for taking nearly $60,000 in donations from a group that claims Iran poses no threat to the U.S.
Recent polls show the race is a dead heat.
| Approve: | 46.0% |
| Disapprove: | 49.0% |
| Spread: | -3.0% |
| Republican: | 39.0% |
| Democrat: | 41.7% |
| Spread: | +2.7% |
| Right Direction: | 31.3% |
| Wrong Track: | 59.4% |
| Spread: | -28.1% |
| Approve: | 14.4% |
| Disapprove: | 77.6% |
| Spread: | -63.2% |
