The source is a first account recording of a statement made by whoever that was, you could have easily cherrypicked that part of the video and frankly I dont care, but it look's like it made no huge difference to me but I come from the UK where electing doesn't consist of massive rally's and the whole US thing of electing a particular person (atleast it looks like thats is happening). When I vote, I vote for what the party stands for and has promised/planned. I think you can actually vote for the leader of a party by paying to do so but most people dont infact do that