The Left is bringing this issue up now because they are terrified that Trump is gaining support among blacks.
Correct! The left has decided that Trump’s “birtherism” will be a show-stopper with blacks if they go on CNN and MSNBC all day every day to remind them of it, which is what we see now.
Chris Matthews has been starting his show every day this past week with this theme, probably in coordination with the Hillary campaign, you know the old jouroList team reactivated.