The Republican candidates for president will be debating on May 3, and Politico wants user-submitted questions that they'll ask during the debate. The event will be broadcast live on MSNBC and streamed live at Politico.com. All of the GOP candidates appear to have been invited, but I don't know which will show up. You can submit your questions at the link, and you can indicate which candidate it's for. You need to sign up first, but that's free. Please think up specific, adversarial questions designed to reveal flaws in the positions or statements of the various candidates. I.e., no general,...