Although Bernie Sanders has made tremendous progress in the Democratic presidential race, a new poll suggests that 2016 hopeful Martin O'Malley may actually be cutting into his base of support.

A new Zogby Analytics poll of likely Democratic caucus and primary voters shows that Hillary Clinton has a strong nationwide lead with 49 percent, while Sanders came in second with 27 percent and 10 percent back O'Malley. Meanwhile, 1 in 7 Democrats said they are still undecided.

According to veteran pollster John Zogby, Clinton's lead may be bolstered by O'Malley's bump in polls, which, in turn, may be comprised of voters who would lean towards Sanders if the former Maryland governor were not in the race.

Clinton also has a big lead among male voters with the support of 49 percent of men compared to 29 percent who stand with Sanders and 14 percent backing O'Malley.

Similarly, more women are voting for the former first lady: 49 percent in comparison to the 25 percent who support Sanders and 7 percent who back the former governor.

However, the survey shows that Clinton's lead is not as wide when it comes to Millennial voters. According to the polling data, 40 percent of 18-29 year olds favor the former secretary of state, while 33 percent back the Vermont senator and 23 percent support O'Malley.

The Democratic frontrunner has also maintained a commanding lead among African-American voters, as a whopping 72 percent said they support her, while only 13 percent are for Sanders and just 2 percent for O'Malley.

Forty percent of Hispanic voters are behind Clinton, 32 percent back Sanders and 20 percent support the former Democratic governor.

A large majority of Democrats - 61 percent - support Clinton, compared to 22 percent who are for Sanders and 7 percent for O'Malley. On the other hand, Sanders, an Independent congressman, tops Clinton by 25 points when it comes to Independent voters: 45 percent back him, 20 percent support Clinton and 13 percent support O'Malley.

Related