I hope you mean it about wanting new blood in the White House. Next year, you are going to have a choice between a Republican who has supported 99% of what George Bush has done and will pledge to continue his policies - or Hillary Clinton who will pledge change from what George Bush has done.
The notion that, somehow Hillary shouldn't be elected because 2 of the last 3 presidents were father and son is absurd. If you want change - vote for the candidate who will change thing. Who cares what her last name is.
Something tells me, however, that you don't want change in the White House. That you are going to vote for the person who wants to continue the polices of the last 8 years. And that this "new blood" cry is just something, anything, to get people to vote against the person who will make the best president.