Omar Suleiman is a former intelligence chief which means he has made many enemies over the years. It would be premature to blame the assassination attempt on Islamists, then. It could have been one of the far left parties, including the commies. It might have even been disgruntled army officers.

Fox News:

A senior Obama administration official confirmed that the attack happened soon after Suleiman was appointed, on Jan. 29. The official described it as an organized attack on Suleiman's motorcade.

White House Press Secretary Robert Gibbs declined to address the assassination reports when asked earlier by Fox News.

"I'm not going to ... get into that question," Gibbs said.

On Saturday, a senior Egyptian security source denied the reports of the assassination attempt, says their was no truth to them at all, Reuters reported.

If nothing else, this proves that Suleiman's elevation is not universally popular. The Brotherhood definitely has a revenge motive after years of being rounded up, tortured, murdered, and jailed by the intelligence service Suleiman headed up. But there also may be factions in the army who had their own favorite and were disappointed in Suleiman's selection.

Even if Mubarak goes, Egypt will not be a very stable country.