Maybe he spoke too soon. Looks like the 19th Century is still in effect:

The Secret Service and the Utah Republican Party have worked out a compromise gun ban during Vice President Dick Cheney's scheduled keynote address Saturday during the state GOP convention. Utah Attorney General Mark Shurtleff and Sandy police have agreed to provide gun lockers outside the convention's security perimeter for safe storage of firearms packed by delegates who are licensed to carry concealed weapons. After Cheney leaves the building, metal detectors at the South Towne Exposition Center in Sandy will be removed and conventioneers will be allowed to retrieve their arms for the remainder of the session.
As one attendee said: "I look forward to seeing you at a very positive, upbeat celebration of our Republican principles."