wsuffa
Touchdown! Greaser!
Almost guaranteed that you'll have to check it. It doesn't matter what the TSA rules are, ewhether you get to take it is solely at the discretion of the screener on any given day. And recall that some checkpoints - like SFO - are manned by contractors who are bound by both the TSA rules and their own. And TSA doesn't like the contractors so they tend to be a bit tougher.