National Review is a conservative journal. This piece is written by a someone with good sources within the Republican Party. More detail on the minority who supports the effort to defund Obamacare comes from the more liberal Plumline at the Washington Post.
John Boehner only keeps his job as Speaker if he has a majority of his party behind him, but it looks like he can only keep the government running by going with a majority of Democratic votes. Given the the Democrats and President Obama will never agree to defund Obamacare, what do you think John Boehner should do?