The same thing was true of Bush, Sr., no matter what egregious calumny was cast at him and his administration (most notably during the Clinton/Bush campaign,) the White House remained silent. Easily disproved slurs and pseudo-facts were dispensed daily by the DBM, the masses sucked it up, and Bush Sr. stared into a corner and wept.
The evidence for the WMD has been percolating throughout the Iraqi War, but do not ever think our current POTUS will even whimper about it.