Hillary Clinton and Bernie Sanders are sharpening their attacks just days away from the first of this years primary contests.<br />Presidential candidates of both parties are barnstorming Iowa with only three weeks left until the states caucuses.<br />With the holidays winding down, the GOP Presidential candidates are focusing on the first major test in the 2012 race, the Iowa Caucuses. (Dec. 27)<br />Presidential aspirants invade the quintessential icon of rural America: The Iowa State Fair. Candidates begin to drop off the campaign trail. Caucus Countdown .
