How Long Can Theresa May Hold On as Prime Minister?

The last time a British Prime Minister was humiliated in a vote they called themselves, they resigned the following day: That was David Cameron on June 24 last year.

Theresa May didn't lose the general election on June 8 as Cameron lost the E.U. referendum, but she was certainly humiliated.

Having called the snap election to grow her parliamentary majority and give herself a mandate going into Brexit negotiations, she watched her party lose the first overall majority it had held in 18 years.