The role of women in this year's presidential election stayed on center stage Thursday after a Democratic consultant's comments triggered a new round of "mommy wars" - pitting mothers who are employed against those who stay at home. The consultant, Hilary Rosen, launched the first salvo, saying on national television Wednesday that Ann Romney, a mother of five who is married to wealthy GOP presidential candidate Mitt Romney, "has never worked a day in her life." Republicans immediately seized on the comment and Ann Romney defended herself on Twitter, saying, "I made a choice to stay home and raise five...