Democratic presidential candidate Bernie Sanders asked in a tweet Saturday, "You have families out there paying 6, 8, 10 percent on student debt but you can refinance your homes at 3 percent. What sense is that?"

You have families out there paying 6, 8, 10 percent on student debt but you can refinance your homes at 3 percent. What sense is that?

— Bernie Sanders (@SenSanders) December 26, 2015

It didn't take Bill Kristol very long to weigh in: "Most economically illiterate tweet ever?"

Most economically illiterate tweet ever? https://t.co/J41XM66i9A

— Bill Kristol (@BillKristol) December 26, 2015

We'll let others, who were no less merciless, explain it:

Hello, my name is #Bernie and although I have no clue how collateral works, I am running for president. Weeeee! https://t.co/UwvISPidpk

— Casey Kim (@caseykim12) December 26, 2015

Well you see, @SenSanders, a home has actual value, whereas a $100,000 degree in "women's studies" is WORTHLESS. https://t.co/CoRqivjOTU

— Bill Sanderson (@BanCollectivism) December 26, 2015

Um, I'm no economics guru, but one is a secured debt; the other is not. Therein lies the "sense." https://t.co/j552apfOEI

— Matt (@Voldematt)

December 26, 2015

It's so weird that someone whose platform is all about economics doesn't understand secured debt and collateral. https://t.co/OTQzGVgLQ7

— Michael Freeman (@michaelpfreeman) December 26, 2015

@SenSanders Students didn't have to borrow knowing rates. You probably think we should just print some money & pass it around too.

— Colorado REDTraci (@goptraci) December 26, 2015

@SenSanders A bank can repossess a house. They can't repossess your brain if you quit paying student loans. Though, you make me wonder.

— Smittie (@smittie61984) December 26, 2015

(H/T: Twitchy)