No, it's not treason.

Whoever, owing allegiance to the United States, levies war against them or adheres to their enemies, giving them aid and comfort within the United States or elsewhere, is guilty of treason and shall suffer death, or shall be imprisoned not less than five years and fined under this title but not less than $10,000; and shall be incapable of holding any office under the United States.

U.S. Code, Title 18, Part I, Chapter 115, Section 2381

I should not actually read polls on the Internet.  This  morning on FaceBook, a friend posted the following poll:

Are Republican​s willing to ruin the American economy and destroy the faith and credit of the United States just to prevent President Barack Obama from getting reelected?

The top answer was "Yes, and it's called Treason."

No, it is most emphatically not.

What the Republicans are doing may be incredibly stupid, short-sighted, and unethical (and I'd be willing to go so far as to call it un-American), but it is not treason.  Treason has a very specific meaning within the law, and for very good reason.

The writers of the Constitution grew up under British rule  They could remember when treason was very loosely defined as "whatever the king or Parliament defined it to be."  The founders defined treason as a very specific act of waging war against the United States. And yes, before anyone brings up sedition, there were acts of Congress defining sedition very loosely. If you want to argue whether or not what the Republicans are doing is sedition, go at it.  (I don't think it qualifies even as that, myself.)

Those of us on the left have always been infuriated by our political opponents calling us traitors, very rightfully so.  When we are doing the same to our them, we are sinking to their level. Whatever the political expediency of that act, it is completely reprehensible.

I refuse to become as awful as they are.  I have to live with myself.