No, it is not. Treason requires collaboration with an enemy. Sedition requires u

No, it is not. Treason requires collaboration with an enemy. Sedition requires undermining the government and the court. Secession was not ‘settled’ by the civil war regardless of what you might think, or what circumventions of the constitution the north got away with after the war.
IN this case the federal government is allowing an invasion and texas invoked the right of self defense as is stated in the constitution which was referenced by Gov Abbot.

Reply addressees: @PDisagreer @bryanbrey @TexasNatMov @ThruTheHayes @LukeWeinhagen @StevePender