In news from the presidential race, a new CBS News poll shows Democratic presidential candidate Bernie Sanders with a one-point lead over former Secretary of State Hillary Clinton in Iowa. This comes exactly one week before the Iowa caucus. Sanders continues to hold a strong lead in New Hampshire, while Clinton is well ahead of Sanders in South Carolina. Meanwhile, former New York City Mayor Michael Bloomberg says he’s considering a potential third-party presidential run, saying he’d be willing to spend at least $1 billion of his fortune on a campaign. Bloomberg says he’ll make a final decision by early March.