"Hillary Clinton added a stop in Michigan and her campaign is pouring more money into advertising there and three other states once considered safe amid concerns among some Democrats that a new FBI review of a top aide’s e-mails may erode her electoral firewall."
http://www.bloomberg.com/politics/articles/2016-11-02/clinton-heads-back-to-long-safe-michigan-as-race-grows-tighter
http://www.bloomberg.com/politics/articles/2016-11-02/clinton-heads-back-to-long-safe-michigan-as-race-grows-tighter