It's no coincidence that Michelle Obama and Ann Romney are showing up a lot more as the tight presidential race barrels into the final few months. The rival campaigns are rolling out their top assets in a big way. The first lady is the public face of a new grass-roots mobilizing effort for Team Obama. And Mrs. Romney's recent interviews have put her on display cutting through the campaign din - including her blunt statement Thursday that her husband has provided everything that "people need to know" and won't be releasing more tax returns.