Newt Gingrich lashed out Monday at what he called a “negative smear campaign” by Mitt Romney. “Understand, these are his people running his ads, doing his dirty work while he pretends to be above it,” Gingrich said in Iowa. “I don’t object to being outspent. I object to lies. I object to negative smear campaigns.” Gingrich was reacting to remarks by Romney that he could not stop the negative Super PAC ads because of campaign laws. Gingrich has vowed to remain positive and disown the Super PAC started by his former aide, Rick Tyler, is it goes negative.