A new Des Moines Register poll in Iowa finds Gov. Scott Walker leading the GOP presidential pack with 16%, followed by Sen. Rand Paul at 15%, Mitt Romney at 13%, Mike Huckabee at 10%, Ben Carson at 9%, Jeb Bush at 8%, Ted Cruz at 5%, Chris Christie at 4%, Rick Santorum at 4%, Rick Perry at 3% and Marco Rubio at 3%.

