When the Republican presidential candidates were asked during Wednesday's debate which woman they'd choose to put on the $10 bill, things got weird. It was almost as if most of them couldn't think of any important women from American history. Former Arkansas Gov. Mike Huckabee said he'd put his wife's face on the bill. Retired neurosurgeon Ben Carson named his own mother.

Perhaps strangest of all was former Florida Gov. Jeb Bush, who suggested that former British Prime Minister Margaret Thatcher ought to adorn the currency.

"It's probably illegal, but what the heck," Bush said Wednesday night, in what seemed like a tacit admission that the whole idea is a little out there. "She certainly was a strong leader that restored the United Kingdom to greatness." (Not everyone in the U.K. shares that view, judging from the response across the pond.)

Bush seemed to want to distance himself from the idea the following morning, telling NBC News that he'd put the question to the Internet and "let people decide ."

The U.S. Treasury announced earlier this year that it plans to replace Alexander Hamilton on the $10 bill with a woman , presumably one who shaped history -- as in, like, American history. Women rumored to be in the running include abolitionist Harriet Tubman , suffragist Elizabeth Cady Stanton , feminist icon Betty Friedan and civil rights hero Rosa Parks.

There was some Beyonce talk -- but to get your face on U.S. currency, you have to be deceased.

It's extremely rare to put a foreign head of state on a national currency. And it's maybe a little troubling that Bush evidently couldn't come up with one American woman to honor on the bill (and that some of his fellow GOP hopefuls didn't venture outside their own family circles).

Real estate mogul Donald Trump named Parks for the $10 bispot, as did Sens. Ted Cruz (Texas) and Marco Rubio (Fla.). Trump also nominated his daughter Ivanka, who is still alive.