Washington, DC (LifeNews.com) -- Barack Obama is coming under fire for a nasty, negative set of radio ads attacking presidential candidate John McCain. The radio ad barrage, which focuses on abortion and stem cell research, is so negative and so inaccurate that even some of Obama's own supporters are questioning it.LifeNews.com has extensively profiled the radio ads Obama's campaign has aired over the last month in battleground states.The ads begin as early as the Republican nomination in St. Paul at the beginning of August.The first Obama ad went after McCain on abortion with claims that women’s lives and health...