TSA is different from airport to airport and I've had or seen challenges in many locations. Aluminum isalways a no-no. If it won't fit in the overhead don't expect to bring it. I've since changed to rods that all fit in a suitcase and pack them.
States where they are more relaxed about rods are mountain states and deep south. Upper east coast (especially DC and Baltimore) are the strictest.
By the way, if you have to check your rod case, it counts as an extra rod. That $50 will go a long way to buying a 4, 5 or 7 piece rod.