Re: Meg Whitman was behaving like a politician -- and a good one
Actually, Mr. Christie's endorsement of Mr. Trump struck me as strange, though not nearly as strange as Sarah Palin's. But Republicans are scrambling to figure out what to do with a presidential nominee who has publicly repudiated much of what the party has stood for most of the last century (though his stance on foreign trade would have been well within the 19th and early 20th century Republican mainstream, which was firmly protectionist).
Democrats had to deal with a highly divisive nominee in the form of George McGovern in 1972 (and more than a few politicians and activists publicly defected to Nixon), but Mr. McGovern was an experienced politician (Trump isn't even an experienced activist), most of his stances were within the Democratic mainstream of the time, and party discipline has never been as important to Democrats as to Republicans (this is largely due to the origins of the two parties). Even when Barry Goldwater's presidential campaign crashed and burned in 1964, few if any prominent Republicans publicly supported Lyndon Johnson. Indeed, I don't think there has been this much public dissatisfaction among Republicans with their presidential nominee since William Howard Taft got the nod in 1912 (he remains the last major party candidate and the only incumbent to ever finish below second place in a US Presidential election since the 12th Amendment established the current procedure, first used in 1804).