He wanted ta get rid of Minnie, so he could become king! But Minnie knew someone was after her life... she's real clever that way.

[although one doesn't have to be clever to realize that someone almost squishing you via dropped safe equals someone wanting you dead, BUT]

So she demanded that she get bodyguards ta protect her. Pete thought if he hired me, Donald, and Goofy for the job, we'd be so lousy at it, that gettin' rid of her would be easy.