Dave Weigel is a supposed journalist who's lied, misled, just made things up, and shown little journalistic integrity. The phrase question authority is not in his vocabulary; where other reporters might be partisan hacks, Weigel is an establishment hack who always takes the side of those with money and power.
The only people Weigel is willing to discomfort are those with no political power: the Larry Sinclairs of the world, militia yahoo t-shirt sellers at tea parties events, and so on. Going after powerless fringe folks endears him to the Beltway establishment and others whose approval he seeks.
Weigel previously wrote a blog for the Washington Post but was banished to Slate after the WaPo discovered that he wasn't the unbiased reporter that they pretended they thought he was. In September 2014 he left Slate for a new Bloomberg news outlet headed by Mark Halperin and John Heilemann.
Before those two stops, he contributed to Reason Magazine, the Washington Independent, and other sites. The first is funded in part by the Koch family. The parent company of the second received funding from a Rockefeller foundation and from George Soros. For an example of his journalistic failings, he's repeatedly misled about the Obama citizenship issue. For an example of him lying about that issue, see this. In early April 2010 he was hired by the Washington Post to run their "Right Now" blog to cover conservatives. In June 2010 he offered to resign and the WaPo accepted after emails he'd sent to the "Journolist" mailing list came to light. Read about that here.
Part of the reason why he continues to mislead about the Obama certificate issue appears to be because he isn't intelligent enough to understand the difference between evidence and proof; part of it appears to be his strong support for Obama; and part of it appears to be that he knows that if he actually looks into the truth about that issue he'd be ostracized by other low-level members of the Beltway establishment.
For another example of his journalistic failings, in January he wrote a post about me on his personal blog. I attempted to respond by signing up and leaving a comment, but he never approved the comment. Here's what David Weigel doesn't want you to see. It's extremely unethical for journalists not to give the right of reply to someone they write about, but that's what David Wiegle did.
In the past, I repeatedly challenged him to simply pick up the phone, call Hawaii, and try to confirm his assumptions. I even provided the questions to ask and the phone number to call. He continually refused. He points out now that he did call Hawaii, but the point is that he didn't do it at the time, and even when he did call he didn't ask the questions - such as those at the link - designed to put them on the spot. Please ask yourself what sort of journalist would repeatedly refuse to do something as simple as picking up the phone, when simply getting an answer to those questions could put the whole matter to rest?