Sanders' comments come after the Clinton campaign joined Jill Stein in an effort to have several recounts carried out after reports of possible voting discrepancies.
►Brian Dickerson: How are we all going to get along now?
The goal is not to seek to overturn Republican candidate Donald Trump's narrow win in the three states but to eliminate the possibility that a cyberattack had manipulated the results.
Wisconsin law calls for the state to perform a recount at a candidate's request as long as he or she can pay for it. If that happens, a tedious and expensive process will begin to hand count the 4,799,284 ballots cast in the presidential race in the state.
Some supporters of Democratic presidential nominee Hillary Clinton have urged her campaign to also request a recount. The deadline for Stein to file for a recount in Pennsylvania is Monday, and she has until Wednesday in MI.
Distraction looms, however, much of it created by the president-elect himself, whose extraordinary claims of widespread voter fraud during a 12-hour Twitter offensive on Sunday cast a shadow over the legitimacy of an election that he actually won.
Kellyanne Conway Criticizes Possibility of Mitt Romney Becoming Secretary of State
There are a number of popular names that President-elect Donald Trump is considering for his cabinet. The day after that meeting, Conway simply described both men as accomplished job creators.
If no candidate receives a majority of Electoral votes, the House of Representatives elects the President from the three Presidential candidates who received the most Electoral votes.
He also alleged that he would have won the popular vote if "millions" of people hadn't voted illegally.
But President-elect Donald Trump lashed out at the efforts on Twitter, saying he would have won the popular vote if there had not been 3 million illegal votes, despite presenting no evidence to substantiate the claim.
Reports of at three least million undocumented immigrants voting in the election are floating around pro-Trump and conspiracy theory websites, including an article published on Infowars - a site that infamously calls Sandy Hook was a hoax - on November 14.
Trump won Wisconsin and Pennsylvania, and as of Wednesday, held a lead of nearly 11,000 votes in MI, with the results awaiting state certification Monday.
Mrs Clinton lost the Electoral College vote to Mr Trump with 232 votes to his 290 - with MI yet to formally announce its result. In Pennsylvania, the margin was 68,236 votes.
While Clinton campaign counsel Mark Erik Elias said in a post on Medium Saturday night that the campaign had been quietly looking at the election results to see if there was any outside interference, "We had not uncovered any actionable evidence of hacking or outside attempts to alter the voting technology". Hillary Clinton's campaign said it would participate in the recount.
Health care industry reels at Obamacare uncertainty
That's the finding of a HealthPocket survey, which asked people what was the most they could afford to pay for coverage in 2017. The House voted to repeal the Affordable Care Act dozens of time, bumping each time against President Obama's veto.
One problem the campaign saw was that many states, including Wisconsin and Pennsylvania, audit the results of the election by canvassing a sampling of precincts. "It is our strong belief that, in addition to an election canvass, every state should do this basic audit to ensure accuracy and public confidence in the election".
Mr Trump was mostly silent on the recount effort until it became known that Mrs Clinton would join it, at least in Wisconsin.
Stein's and Clinton's teams cited concerns over the integrity of voting systems, which Trump himself discussed during the campaign.
Stein said volunteers will also need to take a photo of the affidavit once it's all filled out and email it to her recount team.
Wisconsin's unofficial election results show President-elect Donald Trump with 1,404,000 votes, Hillary Clinton with 1,381,823 votes, Stein with 31,000 votes and De La Fuente with 1,514. "Nothing will change", he said Sunday.
A GOP lawyer says the courts lack authority to order a statewide recount. "And please ... donate whatever you can to help us fight back".
A spokesperson for the Republican Party of Wisconsin called the recount ridiculous, but pledges to cooperate with the process.
Argentina win Davis Cup tennis title
He broke Cilic in the 12th and 10th games in the third and fourth sets respectively to send the match into the decider. If there was one chance for Croatia to win the tie it had slipped away with Cilic's lead.
Green Party presidential candidate Jill Stein and Independent candidate Roque "Rocky" De La Fuente have both asked for a recount.