Former Gov. Tommy Thompson, a Wisconsin Republican running for Senate, recently repeated a mistake that Sen. John McCain (R-AZ) made during the 2008 presidential race and forgot home many homes he owned.

During a campaign event last week, the former Wisconsin governor was asked to count his properties.

“Three,” Thompson confidently stated, according to the Journal Sentinel.

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After being pressed about a fourth home, Thompson said he was sure there were only three: a farm in Elroy, Wisconsin; a house in Madison, Wisconsin; and a 10,889-square-foot home near Walt Disney World Resort in Florida.

The Thompson campaign was later forced to admit that a $1.3 million condo near Lake Wisconsin had completely slipped his mind.

Earlier this year, the candidate reported that he had about $13 million in assets.

“I make no apologies whatsoever. I’m lucky and I’m blessed and I’m very happy,” he said in a January interview. “People forget, you know, about where I came from. They look at this [financial report] and say, ‘Oh my God.’ ”

But Thompson has said that he wasn’t always so comfortable. After receiving a six-figure salary for 14 years as the governor of Wisconsin, he told reporters, “Everybody knows I was broke when I left the government.”

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Thompson will face Democratic U.S. Rep. Tammy Baldwin in November. The most recent Real Clear Politics average of polls gave Baldwin a nearly 5 point advantage.