WASHINGTON (AP) -- Here's another way to look at the Republican presidential campaign: by the numbers.
10 -- Republican candidates who in 2011 entered the race for the Republican presidential nomination (Mitt Romney, Tim Pawlenty, Michele Bachmann, Rick Santorum, Rick Perry, Ron Paul, Jon Huntsman, Newt Gingrich, Herman Cain and Gary Johnson)
7 -- Republican presidential candidates at beginning of 2012 (minus Pawlenty, Cain, Johnson)
1 -- Republican candidate who switched to Libertarian Party (Johnson)
99 -- Iowa counties visited by Santorum and Bachmann