Treason is a ‘’position’’?
Well what the founders did was definitely Treason, but after they founded this nation on the principle that people had a right to independence, the old British principle of "rule by divine right" no longer applied.
If Independence was Treason, the War would have been declared in 1860 when South Carolina declared independence.
Also there was no talk of "Treason" when Massachusetts was threatening to secede. People of the time simply recognized that Massachusetts had the right to do so if they wished.