Scott Adams, of Dilbert fame, writes to the DNRC: "The biggest issue this election is something called flip-flopping, and all candidates are accused of doing it. A strong leader is expected to maintain steadfast resolve in his opinion even if the environment changes or he gets new information. In any other context, that would be considered the first sign of a brain tumor. When presidents do it, it's called leadership, and frankly, we can't get enough of it."
(I've added links - in addition, I hate the term 'flip flop', and I'm on the other side of the Atlantic to the US)