Which terms are taken directly from the Constitutional definition of "Treason".
I understand what you're saying, but Sedition and Treason are two different crimes, and two different issues. Treason is the Act of levying war or the Act of providing aid and comfort to the nation's enemies. And treason is a crime in the US, obviously. Criticism of government or even using speech to attempt to stir up action against government is sedition, which hasn't been a crime in the US for more than 200 years.
I already know what both Treason is and what Sedition is.
And for the most part, sedition got wiped away as a crime because it was politically abused in violation of the First Amendment. That doesn't mean it ought to not be a crime to urge the overthrow of the US government by force, arms and violence.
What should NOT be a crime is the mere verbal act of criticizing the Government or the urging of a change in government via the ballot or via any other legal non-violent means.
For example, I think the Obama Administration is a travesty, He is without a doubt the worst President in U.S. history and more damaging to this Republic than any other POLITICAL figure in U.S> history. He should be chastied wherever he goes and wherever he speaks. His every word SHOULD be placed under a microscope and all that he is up to should be challenged and defeated. He SHOULD get his political ass spanked in the voting booth come November 2012.
I doubt we could get him impeached because his wild and reckless behavior falls short of high crimes or misdemeanors (and there are too many liberal Democratics and similarly inclined fraudulent politicians in office to ever go the impeachment route against President Obama even if his behavior did fall to those depths). But we can and damn well SHOULD oust him from Office at the end of his first (and hopefully last-ever) term as President.
Nothing I just said isn't fully protected by the First Amendment. Some liberal Democratics might wish it were otherwise.