Can't answer all of your questions...but I can answer one you did not ask. Will it give us an option to sending our money to countries like Saudi Arabia and the like? Yes
See that's just it, I am not 100% sure about that. I want to be sure rather than just follow my first thought which was hell yeah do it- if only to take money away from Soros and Buffet. Democrats are forever lining their pockets by killing our energy- ala Clinton's Grand Staircase Escalante Monument boondoggle. Natural to want to screw them back but would rather do what is best. Maybe that means building the pipeline but want to hear the negatives and weigh against the positives and do it is for the right reasons.