Quora may seem an unusual choice for such a thing, but it previously hosted queries from the White House following President Obama's 2012 State of the Union address. Founder Adam D'Angelo said in March that the site has 100 million monthly unique visitors, with about half of those from the US. Reddit, by contrast, hosts around 230 million users per month. (Trump's AMA was not hosted on the main forum, but rather the Trump-friendly "r/the_donald" subreddit.)

Quora recently launched its "Sessions" platform to host Q&A sessions, and VP candidate Kaine was one of the first guests. With the new format, the site promises more Q&As with "economists, authors, political scientists, doctors, movie casts, etc." You can now put your questions to the Democrat party's presidential and vice-presidential nominees, who will respond at a session on August 8th.