Senate candidate Rep. Loretta Sanchez speaks at a news conference to "expose the failure of the mortgage settlement made by Atty. Gen. Kamala Harris" on Oct. 26 in Los Angeles.Orange County Rep. Loretta Sanchez's&nbsp;campaign for the&nbsp;U.S. Senate lobbed a new attack&nbsp;at&nbsp;front-runner Kamala Harris on Wednesday, this time criticizing the&nbsp;landmark $25-billion national settlement Harris helped&nbsp;wrestle from&nbsp;the nation&rsquo;s five largest mortgage firms.The settlement is one of the California attorney general's&nbsp;biggest victories: A&nbsp;recent ad from Harris' campaign&nbsp;featured&nbsp;President Obama praising the settlement. Sen. Elizabeth Warren (D-Mass.) has too.Sanchez, as she has done before, held a news conference outside a state building in downtown Los Angeles, joined by members of an activist&nbsp;group called Occupy Fights Foreclosures, a spinoff of the Occupy LA protest group.Sanchez, who has tried to appeal to conservatives and Republicans in the campaign, tried her hand at economic populism at the news conference.&nbsp;"Harris has not brought one single prosecution against any major bank executive," she said.&nbsp;Michael Troncoso, Harris&rsquo; senior counsel in the mortgage settlement negotiations, spoke to The Times recently as part of an article&nbsp;reviewing&nbsp;the settlement. He&nbsp;said&nbsp;building a criminal case against bankers involved in the foreclosures that led to the national mortgage settlement&nbsp;would have been &ldquo;extremely difficult.&rdquo;Harris reiterated that sentiment in an interview with The Times.&ldquo;I too, like most Americans, am frustrated. Clearly crimes occurred and people should go to jail,&rdquo; Harris said. &ldquo;But we went where the evidence took us.&rdquo;Sanchez, who&nbsp;has increased her attacks against&nbsp;Harris in recent weeks,&nbsp;praised the settlement in 2012.&nbsp;"Special thanks to California Atty. Gen. Kamala Harris for her hard work to ensure help for distressed homeowners and also to pursue the investigation of misconduct by banks,&rdquo; she said in a news release then.Sanchez&nbsp;spokesperson Luis Vizcaino said Harris "failed to lead" when&nbsp;Gov. Jerry Brown took more than $300 million from the settlement fund and&nbsp;diverted it to the state's general fund. A judge later ruled the state had to repay the money."Sanchez&rsquo;s false attacks today are nothing more than a bogus stunt from a desperate politician," said Harris spokesman Nathan Click. "The truth is Sanchez herself praised Kamala Harris&rsquo; leadership on the deal in 2012, spoke glowingly about the aid it provided homeowners and lauded Kamala&rsquo;s perseverance in fighting the big banks."