Sen. Bernie Sanders (I-Vt.) is gaining ground on Democratic presidential frontrunner Hillary Clinton in Iowa, which will hold the country’s first caucuses. The latest Des Moines Register/Bloomberg Politics poll shows Sanders just 7 percentage points behind Clinton’s 37. She’s lost a third of her Iowa support since May. Vice President Joe Biden, who is rumored to be considering a campaign, took 14 percent out of the 404 likely caucus voters polled. On the Republican side, retired neurosurgeon Ben Carson sits in second at 18 percent to Donald Trump’s 23 percent.