At the Volokh Conspiracy, gun rights scholar and Reason contributor David Kopel offers a handy overview of how Obama's potential replacements for retiring Supreme Court Justice John Paul Stevens measure up on the Second Amendment. Here's a snippet:
Extensive record of anti-Second Amendment leadership: Secretary of State Clinton, Sen. Sheldon Whitehouse, Gov. Deval Patrick.
Limited but clearly negative record on right to arms: Judge Diane Wood, Judge Merrick Garland....
Unknown: Elena Kagan
Read the whole thing here.