Student or Learner
It wasn't just Obama, though, pushing the presumptive Republican nominee to put the issue of his tax returns to rest.
Bain far from fading, Obama keeps after Romney
(Note: the superlink buttom fails to work. When clicks on it recent days, the page will break down. So I put the link directly)
To put an issue to rest is to settle it, so it is not "an issue" (not controvertial, not still talked about) any longer.
I'm not a teacher, but I write for a living. Please don't ask me about 2nd conditionals, but I'm a safe bet for what reads well in (American) English.