Hillary Clinton accused Bernie Sanders' this morning of being a fair-weather Democrat.

Clinton said 'there's no indication' that Sanders is working to elect anyone in the party to federal office but himself, subtly calling the independent senator's commitment to his adopted political party into question.

'There's no indication there's any interest there,' she charged in an interview this morning. 'I am committed to electing Democrats. I am committed to raising money. I'm already helping to fund Democratic campaigns.'

The Democratic candidate for president rolled out the line of attack against her opponent over the weekend in Wisconsin, which votes on Tuesday and is a critical contest for the delegate-starved Sanders campaign.

Scroll down for video

Hillary Clinton accused Bernie Sanders' this morning of of being a fair-weather Democrat. Clinton said 'there's no indication' that Sanders is working to elect anyone in the party to office but himself

Clinton brought up her fundraising for national Democrats in the pre-recorded interview that aired today on Good Morning America and said, 'I also think it's important that we elect more Democrats'

'I'm also a Democrat, and have been a proud Democrat all my adult life,' Clinton said in Eau Claire on Saturday.

She added: 'I think it's kind of important if we're selecting somebody to be the Democratic nominee of the Democratic party.'

The next morning, on ABC News' This Week, Sanders said the assault was evidence she's 'getting very nervous' because general election polling favors him against Donald Trump, the likely GOP nominee.

'I believe I am the strongest candidate to take on the Republicans and the fact that I have been the longest serving Independent in the history of the United States makes my candidacy even strong,' he declared.

Sanders said in a general election he would likely 'get virtually all of the Democratic vote' and 'a lot of the Independent vote.'

'I think we've got a lot of young people's vote, working class people's vote. I think we're on the way to a victory if we can win the Democratic nomination,' he said, hitting Clinton with a counter-punch on her weakness with voters under the age of 45.

In her subsequent interview with ABC News, Clinton argued, 'There are a lot of polls that say the opposite, but polls this far out don't mean anything.

'I think what's important is not what somebody's theory is, but how many votes have you got,' she said.

Earlier in the interview she noted that she has 2.5 million more ballots behind her than Sanders and has a distinct lead in pledged delegates - one her campaign has said for weeks will soon prove to be 'insurmountable.'

Clinton late brought up her fundraising for national Democrats in the pre-recorded interview that aired today on Good Morning America and said, 'I also think it's important that we elect more Democrats.

'I would love to see the Senate go back to being Democratic instead of having Republicans who won't do their constitutional obligation.'

Reading between the lines host George Stephanopoulos asked if that means Sanders won't and Clinton said there's 'no indication' that he's concerned about it.

In February Clinton raised $4.4 million for Democrats in addition to the $30.1 million she raised for herself, her campaign disclosed in mid-March. It has not shared its fundraising numbers for last month yet.

A president can independently push an agenda, she said in the GMA interview.

'But I think it will be better for the country if we move away from the obstructionism, the extreme partisanship that we're seeing in the Senate today and we get back to people who want to work together and want to follow the Constitution, which right now doesn't seem to be the case.'

Clinton rolled out the line of attack against her opponent over the weekend in Wisconsin, which votes on Tuesday and is a critical contest for the delegate-starved Sanders campaign. Sanders is seen here on Sunday in Madison

COUNTER PUNCH: Sanders pointed out Sunday that Clinton is struggling to energize key Democratic voting blocs like young people

Polling shows a close race between Clinton and Sanders in Wisconsin tomorrow, but the front-runner has already moved on to New York, the state she was twice elected to represent in the U.S. Senate.

A crushing defeat of Sanders there will choke off all but one route to the nomination for the Vermont lawmaker: a giant win in California.

She'll be in Albany this evening and is expected rally her supporters in New York tomorrow as the results come in from Wisconsin.

Sanders is battling for every vote in Wisconsin and has three rallies in the midwestern state today. He'll look ahead to Wyoming tomorrow, which votes Saturday.

Clinton currently has 1243 pledged delegates to her name. Sanders has a far lower 980 delegates.

A win in Wisconsin tomorrow, where 86 delegates are at stake, will help him survive the next two rounds of voting, Wyoming, 14 delegates, and New York.

At 247 delegates, the Empire State is the single most important state on the map in terms of numbers aside from California, on June 7, with 475.

The latest polling of New York, a CBC News/YouGov survey released Sunday, has Clinton up by 10 in the state she now calls home.

Brooklyn-born Sanders has cut her lead there in half over the last month, however, and his campaign still believes that increased exposure to the candidate and his message before the April 19 primary will further whittle down Clinton's lead.

Clinton hedged this morning when asked if it's a must-win state for her but said: 'I'm absolutely confident I will be the nominee.