Bucky stays over Gedeon, Mandisa or Kevin for that matter?
There's no reason why he should be there over them. He has had 2-3 marginal performances and some really bad ones. But, rather than vote on talent and performances, we gotta vote for the country boy.
Actually, I think Bucky is still around because the mostly pre-teen and younger teenage girls who do most of the voting think he's cute. He is an attractive guy in an 'aw shucks' kind of way. Nice eyes, nice smile, straight guy, blonde pony tail, cowboy hat. Makes the young girls swoon.