“I have some great friends that are NASCAR team owners,” Mitt Romney said Sunday night.

Even as he struggles to win over low-income voters, the former Massachusetts governor can’t seem to help repeated references to his extreme personal wealth. (His net worth is estimated at between $190 and $250 million.)

Here are some of his greatest — or worst — hits.

* “I’m also unemployed,” Romney told a group of out-of-work Floridians at a Tampa coffee shop in June of 2011. The crowd laughed, but given his immense fortune it was a risky joke.

* Defending his tax policy, Romney told a protester in Iowa last August that “corporations are people, my friend.” His point — that “everything corporations earn ultimately goes to people” — got lost.

* In a December 2011 debate, Romney bet Texas Gov. Rick Perry a whopping “$10,000 bucks” to settle a dispute over his health-care record — rattling off the wager like it was chump change.

* Romney slipped up again in early January, saying “I like being able to fire people who provide services to me.” The other Republican candidates jumped on the comment, which was meant to underscore Romney’s free-market principles but which was spun as heartlessness.

* In mid-January, Romney promised to release his tax returns, saying that I get speaker’s fees from time to time, but not very much.” Not very much turned out to be $374,000.

* In a CNN interview in early February, Romney said he’s “not concerned with the very poor,” because “we have a safety net there” — suggesting a lack of awareness of what its like to live in poverty and dependent on food stamps.

* Last week, extolling the Michigan auto industry, Romney casually mentioned that his wife drives “a couple of Cadillacs.”