Gary Gensler, head of the Securities and Exchange Commission, is under increasing scrutiny. The SEC has issued a Wells notice asking him to explain his position on Bitcoin. David Frum says that if one more commissioner withdraws their support for Gary Gensler then he's done. He says it doesn't mean they'll be fired or anything like that but just capitulate in this particular issue.Frum: We're going to see what happens next as these two companies fight back at the SEC.