From Article IV, Section 4 of the US Constitution:
The United States shall guarantee to every State in this Union a Republican Form of Government, and shall protect each of them against Invasion;

US Constitution
"Treason against the United States, shall consist only in levying War against them, or in adhering to their Enemies, giving them Aid and Comfort."

"It is for us the living, rather, to be dedicated here to the unfinished work which they who fought here have thus far so nobly advanced. It is rather for us to be here dedicated to the great task remaining before us -- that from these honored dead we take increased devotion to that cause for which they gave the last full measure of devotion -- that we here highly resolve that these dead shall not have died in vain -- that this nation, under God, shall have a new birth of freedom -- and that government of the people, by the people, for the people, shall not perish from the earth."
President Abraham Lincoln

"You can be my friend, or you can be my enemy, but you cannot be both."

"There is something fascinating about science. One gets such wholesale returns of conjecture out of such a trifling investment of fact."
-Mark Twain

Environmentalists are bad for the environment!