The House of Representatives shall have sole jurisdiction for all bills relating to the raising of revenues, imposition of taxes, adoption of budgets, appropriation of funds, and authorization of indebtedness. All such bills, once passed by the House, shall be submitted directly to the President for signature. In the event of a Presidential veto, both the House and the Senate must vote to override, and such an override requires the approval of two-thirds of the members of each body.
(This will cut the Senate out of the loop, and go far toward eliminating the gridlock. Just as the Senate has sole jurisdiction for the approval of appointments and ratification of treaties, the House would have sole jurisdiction for fiscal bills. There are few changes that would have such a dramatic impact, and would go far to assure that things actually started getting done again.