U.S. Sen. Bernie Sanders (I-VT) is closing in on former Secretary of State Hillary Clinton's lead in the race for the Democratic presidential nomination, according to new polls.

In a New York Times/CBS poll Clinton leads Sanders 48 percent to 41 percent nationally, which is a major difference from the 20 percent lead the former First Lady held one month ago. But among younger voters, Sanders beat out Clinton, garnering respondents' support in that age group 2-to-1. Even still, 7 out of 10 respondents believe Clinton will ultimately win the 2016 Democratic presidential nomination.

Meanwhile, Clinton and Sanders appear to be in a dead heat in Iowa, while the Vermont senator seems to have a lead over Clinton in New Hampshire, according to the latest Quinnipiac, Public Policy Polling, Monmouth University, American Research Group and Wall Street Journal/NBC News/Marist polls. Check out all of the latest poll results in the presidential race via the Real Clear Politics poll tracker.

This week, Sanders was formally endorsed by MoveOn members, who voted overwhelmingly to support the senator, who snatched up 79 percent of the support of the more than 340,000 members that participated in the vote. MoveOn's 2016 Democratic presidential nomination endorsement vote saw the largest number of respondents in the group's 17-year history, according to the progressive political organization.

"It's no surprise that Bernie Sanders has earned overwhelming support from MoveOn members," reads an announcement of the MoveOn endorsement results. "The issues his campaign is raising--tackling economic inequality, ending corporate influence over our politics, breaking up too-big-to-fail banks, expanding Social Security, fighting climate change, avoiding senseless wars, and more--are the same issues that MoveOn members have been fighting for for years."