The Republican underdogs may be gaining ground on Mitt Romney. Support for the former Massachusetts governor dipped to 29 percent this week while Ron Paul's fan base grew by 5 percentage points, according to a new Reuters/Ipsos poll. Paul is now in second place among the candidates vying for the GOP presidential nomination, ahead of Newt Gingrich, who went from 20 to 19 percent, and Rick Santorum, whose support jumped 5 points to 18 percent. Meanwhile, President Obama's support is on the rise, up to 48 percent from 47 in January. However, his disapproval rating has remained at 49 percent since last month.