Why would any person occupying the Oval Office ask a career FBI official who he or she voted for, particularly with a cloud of suspicion over you? Moreover, it is that official’s duty to investigate independent of who they did or did not vote for. Donald Trump has no respect for the independent departments in our government, he wants the entire government to report to him.
(The Washington Post) Shortly after President Trump fired his FBI director in May, he summoned to the Oval Office the bureau's acting director for a get-to-know-you meeting.
This situation is just crazy. The question strongly suggests that Trump wants investigators in the FBI loyal to him so they will not investigate him.
This is obstruction.
Read more: Trump asked the acting FBI director whom he voted for during Oval Office meeting