When a superior force is about to unwittingly enter a swamp while advancing on your position, the last thing to do is entrench yourself between that force and the swamp. Doing so cuts off your own avenue of retreat, and leaves you vulnerable to annihilation.
Instead, you dig your trenches on the other side of the swamp, let the enemy become bogged down, and then snipe, bomb and shell them into oblivion.
To my eye, the Republicans’ concerns over Obamacare are extremely valid. The smart move would have been to allow Obamacare to go forward without this suicidal effort to shut down government and patently empty threat to default on the debt. When Obamacare's faults become evident, as they surely will, then you launch your strike.
Why does this simple degree of common sense shrewdness continue to elude the Republican “leadership?”