In ordering hundreds of military advisors to Iraq and dramatically ramping up intelligence-gathering on jihadist fighters threatening Baghdad, President Barack Obama sent his strongest signal yet that U.S. airstrikes against the Islamic State of Iraq and al-Sham (ISIS) may be likely.

Since ISIS fighters took control of two key Iraqi cities last week, the U.S. military and intelligence agencies have blanketed portions of the country with spy satellites and drones, giving them what one senior administration official called “round-the-clock coverage” of locations where ISIS is active. The military personnel headed to Iraq — as many as 300, Obama said — will work alongside Iraqi military forces in special intelligence centers, using drone video feeds and spy satellite photographs to track and attack ISIS fighters. They’ll also be in a prime position to help carry out U.S. airstrikes the moment Obama orders them.

In remarks from the White House Thursday, Obama didn’t say that airstrikes are imminent. He stressed that the only long-term solution to Iraq’s stabilization will come from political reconciliation between the Shiite-led government and the marginalized Sunni minority. But he left no doubt that he’s putting all the pieces in place to launch the first significant military action in Iraq since U.S. forces left there in 2011. […]