In his eight years, Clinton could have done a hell of a lot to prevent 9/11 from happening. He didn't. IMO, he shares a good chunk of the blame in it happening.
I've posted on this before, but it seems a good time to repeat it. I'm not a major fan of Clinton personally, and it's obvious that every
president should have done more to stop terrorism, since it happened, but... Clinton's not the one with the weak record on terror. In fact, when he tried to pass stronger measures against it, Republicans blocked him.
And a lot of what he did have in place - the Predator drones tracking Bin Laden in Afghanistan, Able Danger, etc. - the Bush administration undid before 9-11, just to show off how "un-Clinton" they could be.
And, if we wanna look at track records of pre-Bush II presidents as a lead-up...
April 18, 1983 - a delivery van full of 400 pounds of explosives deployed on the U.S. embassy in Beirut. No retaliation from Reagan.
Sept. 1, 1983: Boeing 747 hit by a Soviet SU-15. No retaliation from Reagan.
Oct. 23, 1983: 241 U.S. servicemen blown up by a truck bomber. Reagan withdrew from Lebanon, no retaliation.
Oct. 7, 1985, Palestine Liberation Front hijacks the Achille Lauro. Foreign governments handled it, and Reagan does nothing to the PLO, who the incident is tied to.
April 6, 1986 - La Belle disco bombing in West Berlin, tied to Lybia. Reagan finally retaliates on a limited scale, killing Quaddafi's 15-month old daughter. Quaddafi himself... still around!
April 2, 1986 - TWA flight 840, bombed. No retaliation from the gipper.
1988 - Pan Am 103 blown up. Lybia won't hand over the suspects, Bush Sr. shrugs it off.
Feb. 26, 1993 - World Trade Center bombing. Clinton got the perpetrators and starts programs to nab Osama Bin Laden, once his connection to it is determined.
April 19, 1995 - Oklahoma City bombing. Tim McVeigh, captured and eventually killed.
August 7, 1998 - U.S. embassies in East Africa bombed by Al Quada. Clinton ordered cruise missle strikes in Sudan and Afghanistan. 8 of the conspirators dead or captured. Hunt for Bin Laden intensified, via Predator drones, Able Danger program, and other devices later discontinued by the Bush administration.
1999, Ahmed Ressam arrested, and a plot to bomb LAX foiled, as well as 3 other attacks slated.
Oct 12, 2000 - U.S.S. Cole attacked. This was a month before elections, and Clinton didn't have time to get much started since he was on his way out and didn't want to hand a huge mess over to whoever would be following him... but, he did get the intell in place. Bush came into office... and did nothing about it for 8 months, even ignoring daily briefings that said Bin Laden was determined to attack inside the U.S.
Following that up with Bush mis-using the intelligence we had in place, ignoring real intell to cherry-pick out items that would support the plan he'd already decided upon, to lead us into a real mess.
Clinton's a slimy human being, yep, but he's not the weak link.