Rich Lowry sums it up best:http://www.nationalreview.com/node/431947/print
The Coming Anti-Trump Onslaught
“If Trump romps to the nomination by mid-March, non-Trump Republicans will have lost to him in part through a lack of trying. That will never be true of the Democrats, who will gleefully and maliciously do the Trump vetting that the GOP race has, so far, been missing. ”
The anti-Trump onslaught is coming. Perhaps within weeks. Just not necessarily from Republicans. Almost as soon as Donald Trump is the presumptive GOP nominee — which may be as early as March 15 — Democrats will surely start to churn out their negative ads. They will attack Trump’s credentials as a tribune of the little guy by focusing on a money-grubbing venture like Trump University, designed to extract as much cash as possible from people who thought they would learn something from the shell of a school.They will dissect his business record. They will fasten on his failed casinos and the bankruptcies he used to stiff creditors while maintaining a lavish lifestyle.They will fry him for hypocrisy on immigration by pointing out that Trump Tower was built by illegal Polish immigrants worked to the bone and that, according to news reports, illegal immigrants are helping build his new hotel in Washington.They will make the cheap threats he throws at anyone who crosses him a character and temperament issue. They will hound him about his unreleased tax returns. And, of course, they will use decades-worth of controversial statements to portray him as racist and sexist.
This will all be in the tradition of the early Democratic ad campaigns that successfully knee-capped Republican nominees in 1996 and 2012 (Bob Dole and Mitt Romney, respectively). A Democratic campaign to disqualify Trump would seek to make his unfavorable rating (already 60 percent with the general public) not merely alarming, but completely radioactive.
How will Trump fare against such ads? Maybe he will prove impervious to all such criticism, or maybe he will wilt under the assault. Who knows?
In this sense, Republicans are outsourcing the vetting of their front-runner to the other party. At this rate, they will make Trump their de facto standard-bearer in a little less than three weeks, never having run him through the paces of the painful testing that is usually inherent to the process.