Re: Borg or Dominion??
Really, I think it's safe to assume that any of the major powers could blow up a planet _if they wanted to_. The only questions are how many ships they'd need and how long it would take.
Also, there's the distinction between blowing up a planet and simply neutralizing anyone living on it. Even the Maquis had the ability to kill off an entire world.
It was the best of Trek, it was the worst of Trek...
"If I lean over, I leave myself open to wedgies, wet willies, or even the dreaded Rear Admiral!"