This latest ad from Moveon PAC is about as misleading as it can be. Through words, graphics and sound effects, it invites viewers to think that the expiration of the ban on 19 semiautomatic assault weapons will allow people legally to buy fully automatic machine guns that can fire "up to 300 rounds per minute." That's false.

It has been illegal to buy a machine gun without federal clearance since 1934, and remains so.

The ad also claims that Bush "will let the assault weapon ban expire," which is misleading. In fact, Bush spoke in support of the ban during his campaign four years ago and his spokesman said as recently as May of last year that he still supported it. It was Congress that failed to consider extending the ban and didn't present Bush with a bill to sign.