...All that's needed is for more than two thirds of the Senate to vote for any bill, and The President's veto power is gone.....
you seem to need a little help on our laws-
http://clerkkids.house.gov/laws/bill_veto_override.html
You suspect 2/3 of the Republican controlled Congress would override their President? What does that tell you? Still waiting foy you to point out all the bills he has vetoed!