He says his political enemies have been conducting a 'stealth' [='secret'] campaign to block his nomination.
The fox uses 'stealth' and cunning to hunt its prey.
a 'stealth' bomber/fighter
(..) - How can we lose a guy that big? OK. Guys! Guys? - Hey, Po. - What? Sorry. So that was stealth mode, huh? To be honest, not one of my stronger modes. ...gold in there, come on! This rice is raw! You stole all my metal pots (..)2011 Kung Fu Panda 2
(..) Hey, isn't that the guy who hammered you in the face? I do not like that guy. We need to get to that tower without being spotted by those wolves. Got it. Stealth mode. - Get out of the way! - Foiled again. Now, where'd those noodles go? Hello. I couldn't help but... Yeah, OK. Anyway, where was I? (..)2011 Kung Fu Panda 2