NEW YORK – U.S. Sen. Bernie Sanders’ presidential campaign on Monday questioned “serious apparent violations” of campaign finance laws under a joint fundraising deal between Hillary Clinton’s campaign and the Democratic National Committee.

The questionable dealings were detailed in a letter from Brad Deutsch, the attorney for Sanders’ campaign, to U.S. Rep. Debbie Wasserman Schultz, the chair of the DNC. The letter questioned whether the Clinton presidential campaign violated legal limits on donations by improperly subsidizing Clinton’s campaign bid by paying Clinton staffers with funds from the joint DNC-Clinton committee.

Unlike Clinton’s presidential campaign committee, Hillary for America, the joint committee may accept large donations of up to $356,100. The first $2,700 of this amount is eligible for transfer to the Clinton campaign, $33,400 can be transferred to the DNC, with any remaining amount, up to $10,000, to each participating state party. According to public disclosure reports, however, the joint Clinton-DNC fund, Hillary Victory Fund (HVF), appears to operate in a way that skirts legal limits on federal campaign donations and primarily benefits the Clinton presidential campaign.

The financial disclosure reports on file with the Federal Election Commission indicate that the joint committee invested millions in low-dollar, online fundraising and advertising that solely benefits the Clinton campaign. The Sanders campaign “is particularly concerned that these extremely large-dollar individual contributions have been used by the Hillary Victory Fund to pay for more than $7.8 million in direct mail efforts and over $8.6 million in online advertising” according to the letter to the DNC. Both outlays benefit the Clinton presidential campaign “by generating low-dollar contributions that flow only to HFA [Hillary for America] rather than to the DNC or any of the participating state party committees.”

The questionable outlays “have grown to staggering magnitudes” and “can no longer be ignored,” Deutsch added.

The expenditures on advertising and fundraising are at best “an impermissible in-kind contribution from the DNC and the participating state party committees” to Clinton’s presidential campaign, the letter said. “At worst, using funds received from large-dollar donors who have already contributed the $2,700 maximum to HFA [Hillary for America] may represent an excessive contribution to HFA from these individuals.”

In addition, the joint committee has paid the Clinton campaign committee $2.6 million ostensibly to “reimburse” the Clinton presidential campaign staff for time spent running the joint committee. The unusual arrangement, Deutsch said, “raises equally serious concerns that joint committee funds, which are meant to be allocated proportionally among the participating committees, are being used to impermissibly subsidize HFA through an over-reimbursement for campaign staffers and resources.”

“While the use of joint fundraising agreements has existed for some time — it is unprecedented for the DNC to allow a joint committee to be exploited to the benefit of one candidate in the midst of a contested nominating contest,” said Jeff Weaver, Sanders’ campaign manager.

With just a day to go before New York's presidential primary, Councilman Ritchie Torres of the Bronx is throwing his support behind Bernie Sanders, citing the Vermont senator's progressive agenda.

“Bernie represents a special phenomenon in progressive politics. He singularly has made inequality and poverty the focal point of the presidential election — that is his contribution to progressive politics and he’s energizing young people to an extent never seen before,” Torres said, in an interview with POLITICO New York.

Torres, who grew up in public housing in the Bronx, sent a letter to all the presidential candidates last week asking them to tour New York City Public Housing Authority buildings to see a glimpse of what decades of federal divestment has done to the city’s public housing stock.

Bernie Sanders urged caution Monday against interpreting polls showing him trailing Hillary Clinton in New York. His argument: We've been here before.

"Those are the public polls. The bottom line is, let's look at the real poll tomorrow," the Vermont senator told NBC's "Today." "Generally speaking, polling has underestimated how we do in elections."

Sanders noted that his campaign was down by as many as 25 points in Michigan before it pulled off the upset victory on March 8.

Clinton (again) asks where Sanders was during the health care fight of the 90s: "Where were you? I mean, really??"

"We *can* have political candidates and a political system that reflects our values!" #FeelTheBern #Kohndorsement