Seeing where the Iraq situation is going (i.e. nowhere, fast), and with Iran on the horizon, Majority Democrats are moving toward reworking the 2002 authorization which gave President Bush the green light to invade Iraq in the first place.
This would not mean a broad pullout of troops from Iraq, but, instead, a limiting of their efforts to specific on-mission tasks.
The move is an important one, not just because it seeks to shift a failing policy in Iraq, but also because it will reign in an increasingly undemocratic (and arrogant) president.
Bush has repeatedly cited the 2002 authorization as giving him broader powers than Congress ever intended.
The purpose was to allow an invasion of Iraq, based on the now-disproven threats of Saddam Hussein's links to Al Qaeda and WMDs – not to allow illegal wiretaps, torture, extraordinary renditions, or to suspend habeas corpus.
Bush will most certainly use the authorization to attack Iran if it is not reworked with more specific language.
To be clear, we cannot allow a nuclear Iran. Even if their intentions are peaceful (i.e. supplying their people with energy), rogue elements within that country could still use the technology to do harm. It would not surprise me in the least, were that to happen.
But we need to exhaust every possible course of action before attacking Iran. That may mean swallowing our pride and sitting down at the table with them, as disagreeable as it seems. We can't say we've tried everything – as I expect Bush will do – unless we have tried everything.
And it's certainly preferable to getting bogged down in another Middle Eastern conflict for which we don't have the resources.