The group emerged as Mr. DeSantis’s original super PAC began canceling its planned TV advertisements in Iowa and New Hampshire.A new super PAC that popped up in support of Gov. Ron DeSantis this week is preparing to air an ad that features Casey DeSantis, his wife, talking about her experience with cancer. The ad is nearly identical to one that was broadcast during his re-election campaign for governor last year, a video of the new spot shows. The group, Good Fight, was formed on Wednesday and soon began shipping copies of the ad to television stations. The Times obtained the ad from a person who received a copy of it, but who requested anonymity in order to share it. The narration of the ad is virtually the same as in the 2022 ad, but the new version features some new images and clips — of his children playing at the Field of Dreams in Iowa, for example — briefly spliced into the middle.Such a move could be considered “republication” of an ad, which the Federal Election Commission has regulations against. For instance, the super PAC supporting the 2012 Republican presidential nominee, Mitt Romney, later paid a fine related to republishing an ad from Mr. Romney’s 2008 presidential campaign. It is unclear whether those regulations would apply here, since the original spot is from a state campaign and not a federal one. The DeSantis ad features Ms. DeSantis trying to humanize her husband — who is often described as stiff on the campaign trail — as a father and a supportive husband when she faced breast cancer. The version that aired in 2022 had a logo that read “Ron DeSantis Florida Governor” in the upper-right corner; that logo is blurred out in the new spot sent to stations, which ends with a disclaimer that it was paid for by Good Fight.Craig Mareno, an accountant with Crosby Ottenhoff, a firm based in Birmingham, Ala., is listed on documents creating the group that were filed with the F.E.C. Reached by phone, Mr. Mareno declined to answer questions about the group or the ad, and asked for an email that he could forward to another official he said could answer questions. The DeSantis campaign did not immediately respond to a request for comment.Adav Noti of Campaign Legal Center said it was unclear how the F.E.C. would view the use of the old DeSantis ad, since Mr. DeSantis was not a federal candidate at the time. “The entire DeSantis operation, including the campaign and all of the super PACs, have been pushing the legal envelope since the beginning, and this use of prior campaign material to put out presidential campaign ads is another example,” said Mr. Noti, whose group has already filed an F.E.C. complaint accusing Mr. DeSantis’s presidential campaign of coordinating illegally with the original DeSantis super PAC, Never Back Down.Good Fight emerged as Never Back Down, a deep-pocketed but embattled organization, began canceling $2.5 million in planned television advertisements in the early nominating states of Iowa and New Hampshire, according to AdImpact, a media tracking company.Campaigns are not allowed to coordinate directly with super PACs, but the move appears to align with the strategy suggested by the DeSantis campaign in a memo in late November.James Uthmeier, Mr. DeSantis’s campaign manager, wrote in the memo that a new super PAC formed to aid the governor, Fight Right, would air television ads, and Never Back Down would focus on its “field operation and ground game.”Never Back Down has poured millions into an ambitious door-knocking operation in early states, especially in Iowa. But that ground game has sputtered, with Mr. DeSantis’s poll numbers stagnating as former President Donald J. Trump remains far ahead both in Iowa and nationally. And the super PAC itself has been embroiled in turmoil, with a series of top executives and strategists departing over the past month.Fight Right, formed by people with ties to Mr. DeSantis, originated amid internal disagreements over strategy at Never Back Down, which struggled to meld veteran political strategists from a consulting firm with DeSantis loyalists. Mr. DeSantis had also been troubled by the group’s advertising strategy, as The Times previously reported. Fight Right began airing ads in late November attacking former Gov. Nikki Haley of South Carolina.In a statement, Scott Wagner, the chairman of Never Back Down, said the group was “laser focused on its core mission — running the most advanced grass-roots and political caucus operation in this race and helping deliver the G.O.P. nomination for Governor DeSantis.”“We are thrilled to have Fight Right and others covering the air for Governor DeSantis while we work the ground game in Iowa, New Hampshire, South Carolina and beyond,” Mr. Wagner added.Taryn Fenske, a spokeswoman for Fight Right, said the group was placing an advertising buy of more than $2.5 million starting Sunday, with $1.3 million behind an anti-Haley ad that is slated to start running in Iowa that day.Never Back Down previously transferred $1 million to Fight Right, which helped precipitate a major leadership shake-up at the original super PAC, where some officials questioned the move. Officials with Never Back Down and Fight Right would not directly answer questions about whether the canceled $2.5 million was being used to fund the new Fight Right ads. Both Fight Right and Good Fight are using the same firm, Digital Media Placement Services, to purchase airtime, according to AdImpact’s records. More