Democrats were demanding more than $800 billion in new tax revenue, causing heartburn among the hard-line fiscal conservatives who dominate the House Republican caucus.Wrong. Fiscal conservatives are deficit hawks. They don't want the federal budget to run a deficit. That's what fiscal conservative has pretty much always meant.
Fiscal conservatives do not dominate the House Republican caucus. Fiscal conservatives appear to have virtually no influence with House Republicans.
To the contrary: as far as I can tell from their actions, mainstream conservatives just don't believe in the concept of budgets at all these days. If you don't believe in budgets, then you really can't (effectively) care about deficits, no matter how much lip service you give to it. All of which is well within their rights (although at least a bit goofy, given both their anti-deficit rhetoric and the mathematical facts of individual spending and tax decisions).
But it's wrong for objective observers to describe Republicans as fiscal conservatives, when in fact it's Democrats, for better or worse, who appear through their actions to actually care about reducing budget deficits. It's bad reporting by Montgomery and Kane.