WMD is the Bush man facts 
Obama facts came from reliable intelligence.
"Reliable sources", the same as for Bush.
D-G, the WMD question in Iraq can have a preponderance of evidence from programs, from matérial, from this and from that. Until you touch it and feel it it is not 100%. We knew then and we know now that the evidence was cooked and "Curveball" was the game-changer and we know what a dog he was.
In Syria, forget all the surveillance and spying and digital intercepts of communications and gas masks being worn by Syrian soldiers. What we have is the evidence that you can touch and feel. EVERYBODY reported it - Doctors without Borders suffered 10 gas injuries and 1 death. The BBC had people on the ground and they reported it. The difference here D-G is not to inferentially or deductively decide whether WMD existed in Iraq in 2003. Here we see, smell and feel the evidence. Obama does not need to resort to shenanigans. Now I know you want to believe that it is Obama or the Israelis who planted the gas to put blame on Assad. Or Assad did it to invite the US response and say, see it's the rebels who did it and a sovereign country comes under attack.
You see D-G you made up your mind long ago that any force fighting the US in the Middle East (Osama, Al Qaeda, Hezbollah, Iran, Shiites, etc.) is right and the US is wrong.