His “twitter spasms” aren’t a new development; perhaps you haven’t been paying attention. He’s done the same against Jeb, Carly, and others.
Trump may be alienating Cruz folk, but Cruz is alienating Trump folk, and there are more of them.
At some point he needs to stop or he has zero chance of election. Act like a president or go back to TV celebrity. As I said it was effective early to establish himself and dump on the weak establishment losers. I and many said at the time, he has to morph into a controlled disciplined communicator or he has no chance. What this is going to is alienate a large number of voters he needs. He started down this path a month ago and wisely backed off at the December debate. Now, he’s doubling down on stupid and he’s going to wound himself so bad that he’ll lose SC and FL and spiral downward, or he’ll survive and get trounced in the general when he has pissed on everyone. He was wise to attack the DC political class. He’s growing towards narcissistic behavior now. Somehow many here who detest that aspect of Obama welcome a new narcissist who they agree with on a few issues.