There may be other things going on in DC that take priority. The pentagon is pretty busy right now with the sh.t storm thats coming.
I hope thats the reason. Hopefully things will simmer down after the swamp gets drained some.
If thats the case, it'll be worth the wait.
Don't count it out just yet.... the following text is at the top of the RT website..
With respect to the press release that 2019 is the final year of the Rolling Thunder Demonstration Run; there are other Veterans organizations that CAN and WILL ensure this Memorial Day tradition continues. -RTWDC