Arguing that “[f]irst, the president was given the pocket veto to defend against any congressional effort to duck, and therefore thwart, the regular veto . . . . Second, the Constitution establishes a clear preference for regular veto over pocket veto use . . . . Third, the founders were concerned about the uncertainty that might arise from legislation passed by both houses at the end of a session that was followed by a lengthy break and about which presidents had reservations . . . . Fourth, the pocket veto wording that defines the power as available when adjournment prevents bill return also means that there are adjournments when bill return is possible; that is, not all adjournments invite or allow a pocket veto.”