Iraq's parliamentary election on November 11 arrives as Tehran's regional hand weakens and the outcome could determine whether it preserves a vital anchor in its sphere of influence, financing, and deterrence or slides into a costlier, fragmented game of managing proxies from afar. With setbacks in Syria and growing constraints on Hezbollah -- designated a terror organization by the United States -- in Lebanon, Iraq has become the indispensable arena for safeguarding Tehran's regional depth, economic access, and deterrence architecture. "The parliamentary…