Sorry, but my English is not the best..

הסדרה is derived from להסדיר which means - to make something proper or correct, or in this case - legal (will solve and override the legal problems regarding Amona settlement).  It is a contemporary fashion word that you may not find in the dictionary.

יתן רוח גבית - will support. Like in sport, when wind from the back pushes the runner ahead.

וכיום עננת הממשל האמריקני לא יכולה לשמש עוד כתירוץ להמשך יישום מדיניות שמאל - And today, the "cloud" of the American government, cannot be used anymore as an excuse for continuing the implementation of the left wing policy.
I guess he choose the uncommon image of "cloud" in order to describe something frightening that observe you and you cannot ignore its presence.