NEW : `` These are difficult days Republicans led by presidential challenger Mitt Romney served up a heaping helping of political red meat on Friday , launching a salvo of attacks on President Barack Obama that called him a liar and a failed leader . , '' President Obama says of anti-American unrest . Obama says Obama will be untruthful in the debates . Paul Ryan blames Obama for Arab unrest in anti-American nations . The Obama campaign calls Obama 's criticism `` over-the-top '' and dishonest .
NEW : `` These are difficult days , '' President Obama says of anti-American unrest . Obama says Obama will be untruthful in the debates . Paul Ryan blames Obama for Arab unrest in anti-American nations . The Obama campaign calls Obama 's criticism `` over-the-top '' and dishonest .