SPRINGFIELD ‒ With polls predicting a close race in Massachusetts' upcoming presidential primary, Hillary Clinton's campaign launched a new television ad in markets across the Bay State on Friday.

The 30-second ad, entitled "New World," seeks to highlight the former secretary of state's track record of delivering results, her campaign said. It will run in the Boston and Springfield media markets through the March 1 primary.

Building on the campaign's message that she is not a "single-issue candidate" -- a criticism indirectly leveled at Democratic opponent U.S. Sen. Bernie Sanders, I-Vt. -- the ad touts Clinton's efforts to secure a reduction in nuclear weapons, fight for women's rights, protect Social Security, expand benefits for military families and ensure health care for millions of children.

"The presidency is the toughest job in the world and she's the one who will make a real difference for you," it contends.

The new television ad comes just one week after Sanders' campaign spent more than $116,000 on a Western Massachusetts television ad buy, which included more than 670 spots over four stations through late-February, according to Federal Communications Commission records.

The Democrats' campaigns have turned their focus to Massachusetts ahead of so-called "Super Tuesday," particularly as recent polls have suggested Sanders could win the state.

Clinton, who is looking to hold onto Massachusetts, which she won in 2008, plans to open up a series of organizing offices across the state on Saturday.