How so? The CP wants to fight the war constitutionally and there is dispute over what constituttes a proper declaration of war. It would undoubtedly not get out any faster than the Bush Administration would. We're there; bugging out quickly would be disastrous. We need to finish what we started. (That was the position of the CP's candidate (actually, its state affiliate) in California's special election, also.) Nation-buliding is one thing; however, removing tyrants who are threatening the United States is something else again. Now it is important to restore stability.
Even the most fervent supporters of the policy in Iraq want us to be out of there as soon as it's practicable to do so. It's a matter of when that is.
As for fighting the war while observing constitutional liberties, obviously some national security measures are necessary. But if we lose the Constitution, we lose America. We must protect the country's security in the way that does the job effectively while maximizing individual freedom, which the Constitution protects.
Respectfully, the actions by this Administration have not put the Constitution in jeopardy.