Uh, no it isn’t Bob.
“Treason against the United States, shall consist only in levying War against them, or in adhering to their Enemies, giving them Aid and Comfort.” - Article III, US Constitution
Criticizing those in power is not treasonous in the American republic!
I would posit that a lot of the invective that was thrown at GWB in the run-up to and during the Iraq war went way beyond legitimate criticism and into the realm of giving aid and comfort to the enemy. Nothing that any of us on the right has said about 0bama comes anywhere close.