Republican presidential hopeful Newt Gingrich continues his bus tour of Iowa. After leading in the polls, he's had setbacks in recent days. Negative campaign ads by his opponents have hurt him with some voters. And on Tuesday, the former House speaker found his message side tracked by new disclosures involving the divorce from his first wife.
GOP presidential candidates are touring Iowa ahead of next week's caucuses. The main issue for many voters there is the economy, but another hot topic is emerging: overhauling immigration policies. Iowa's Hispanic population is surging, and Republican candidates are struggling with how best to deal with voter concerns.