The GOP doesn't have a Donald Trump problem. It has a problem recognizing that Trump is showing them the most effective way to deal with the loons on the left and their allies in the mainstream media; Stand your ground, don't back down, and hit them back every time they hit you. This is what's driving the left absolutely nuts. Trump isn't reacting to their criticism and name calling the way most Republicans react: backtracking on their comments, apologizing profusely, and begging for forgiveness. Instead, Trump stands his ground, hits them back, and sees his poll numbers go up as a result. They're not use to this, and are going crazy trying to figure out what to do about it.
They don’t know what to do is right. They need to imitate Trump.