In a fundraising letter, Joe Biden wrote that he “can’t understand” why “the Republican Party is letting Ted Cruz lead their charge against Obamacare.”

Before long, Twitter was on fire with other #ThingsBidenCantUnderstand. Here are more things that might leave Joe scratching his head:

https://twitter.com/OakRidgeStars/status/384451318770704386

Biden certainly hasn’t figured this one out:

More:

https://twitter.com/ForrestBH/status/384462318853042176

https://twitter.com/LolaGOP/status/384461745613701120

These two are last, but certainly not least:

https://twitter.com/UniteRight/status/384462577813958656

A true classic.