Where is the US reaction

Here is the lead to a late breaking story from Iraq:

"BAGHDAD (AP) - A senior Kurdish official in northern Iraq says Iranian troops have crossed the Iraqi border in pursuit of Iranian Kurdish rebels.
Jabar Yawar, a deputy minister in the Kurdish autonomous region in northern Iraq, said Saturday that 35 Iranian soldiers remain in the Iraqi village of Perdunaz after crossing the border last Thursday.

Yawar said the Iranian troops have ventured about a mile (1.6 kilometers) into Iraq. Perdunaz is an Iraqi border town east of the Kurdish capital of Irbil.

He said Iranian troops have been shelling the region for days in pursuit of a Kurdish rebel group known as the Party for Free Life in Kurdistan, or PEJAK. Iran has previously targeted the border areas in pursuit of PEJAK fighters."

Is this for real? Are there really Iranian troops in Iraq shelling Iraqis? If this is so, it represents a major escalation of the Iranian moves designed to embarass the US and Iraq.

What is the US reaction? Were Bush still president, I would expect to hear that Marines had landed in a fleet of helicopters and surrounded and subdued the Iranian invaders. It would lead to a confrontation with Iran, but even the Iranians would be hard pressed to explain why their troops were over a mile into Iraq and why they were shelling the Iraqi villages in the area. With Obama, one never knows. Maybe he will read a speech off his teleprompter talking about the vast progress that has been made in dealing with Iran. Maybe he will agree to a deal under which the Iranians withdraw in exchange for the US paying reparations and agreeing not to oppose Iranian nukes any longer.

Could he be any weaker? OK, I realiaze that this is premature and maybe the story is not even correct. Even so, Obama has got to go!