"Gotcha" Question Double Standard?

Kevin Drum notes conservative complaints that Republican Presidential candidate Scott Walker has been unfairly peppered with "gotcha" questions from media (about Giuliani's questioning President Obama's love for America, evolution, and whether Obama is a Christian) on Mother Jones.

As for the other stuff Walker is being asked about—evolution, climate change, Obama's religion, etc.—there really is a good reason for getting someone like Walker on the record. He's basically a tea party guy who's trying to appear more mainstream than the other tea party guys, and everyone knows that there are certain issues that are tea party hot buttons. So you have to ask about them to take the measure of the man. Sure, they're gotcha questions, but they have a legitimate purpose: to find out if Walker is a pure tea party creature or not. That's a matter of real public interest.

Conservatives are complaining that Walker is facing a double standard. Maybe. We'll find out when Hillary and the rest of the Democratic field start campaigning in earnest. But I'm curious. What kinds of similar questions would be gotchas for Democrats? Drivers licenses for undocumented workers? Support for single-payer healthcare? Those aren't really the same, but I can't come up with anything that is. It needs to be something that's either conspiracy-theoryish or else something where the liberal base conflicts with the scientific consensus, and I'm not sure what that is. GMO foods? Heritability of IQ? Whether George Bush stole the 2004 election by tampering with voting machines? I'm stretching here, but that's because nothing really comes to mind.

Help me out. What kinds of Scott-Walkerish gotcha questions should reporters be saving up for Hillary?

Drum's question may prove difficult to answer because of a phenomenon noted by George Packer in The New Yorker in one of my all-time favorite blog posts.

Sean Hannity, Rush Limbaugh, and Glenn Beck have far more power in the Republican Party (it sometimes seems to include veto power) than Klein, Lee, and Moore have in the Democratic Party. The views of right-wing commentators in the grip of the paranoid style (Obama is a stealth radical, the Democrats are imposing socialism) are much closer to mainstream conservative and Republican belief than the views of their counterparts on the left (the levees in New Orleans were blown up by the government, the White House had something to do with 9/11) are to mainstream liberal and Democratic belief. The reasons are complex, but I would list these: the evangelical and occasionally messianic fervor that animates a part of the Republican base; the atmosphere of siege and the self-identification of conservatives as insurgents even when they monopolized political power; the influence of ideology over movement conservatives, and their deep hostility to compromise; the fact that modern conservatism has been a movement, which modern liberalism has not.

One reason Democratic candidates are not subjected to the same kinds of "gotcha" questions by the press is that kooky, "conspiracy theoryish" beliefs that conflict with the scientific consensus are far more prevalent on the right.