Historically, FBI heads have had near-unanimous approval. Comey was confirmed on a 93-1 vote. His predecessor, Muller, was originally appointed by Bush and confirmed by a 100-0 vote. 10 years later, he got another term under Obama and was confirmed by a 98-0 vote. All their predecessors were confirmed unanimously.

It's not supposed to be a political job.

[1] http://www.businessinsider.com/why-can-president-trump-can-f...