CNN is broadening its criteria for next month's Republican presidential debate, including polling from Iowa and New Hampshire to determine which candidates make the main stage.<br />The cable network said on Friday that candidates will need to have either a national polling average of 3.5 percent or higher, or be polling at 4 percent or higher in Iowa or New Hampshire, to qualify for the prime-time debate, which will be held in Las Vegas on Dec. 15.<br />The change comes as networks have faced sharp criticism from candidates, such as Gov. Chris Christie of New Jersey, who have been relegated to the so-called undercard debates and those who have been left out entirely, like Senator Lindsey Graham of South Carolina.
