Sen. Bernie Sanders (I-VT) is slated to appear with Graham Platner, a Democrat running to unseat Sen. Susan Collins (R-ME), at a rally in Portland, Maine, on Labor Day, as the progressive leader from Vermont steps up his efforts to boost left-wing candidates who have been outspoken in their criticism of Israel and its ongoing war in Gaza.

Platner, a first-time candidate and Marine veteran who launched his campaign last week, has accused Israel of committing genocide in Gaza and backed Sanders’ recent resolutions to block arms sales to Israel. Platner’s rhetoric has faced criticism from Collins, a moderate Republican seeking her sixth term.

Sanders, who announced the rally on Monday, has not officially endorsed Platner, a 40-year-old oyster farmer whose past social media activity indicates he is a longtime admirer of Vermont’s democratic socialist senator. 

The Portland event on Sept. 1, the next stop on Sanders’ nationwide “Fighting Oligarchy” tour, follows a rally in Michigan on Saturday at which the senator sought to boost Abdul El-Sayed, a staunch critic of Israel who is vying to replace retiring Sen. Gary Peters (D-MI) in a crowded primary next year. 

In remarks over the weekend, Sanders, an early backer of El-Sayed’s campaign for the Democratic nomination, highlighted his efforts to restrict U.S. military aid to Israel and spoke out against the humanitarian crisis in Gaza, claiming that Washington is “way out of touch with where the American people are” on what he called “clearly a moral issue.”

“We are paying for the starvation of children in Gaza,” Sanders said to the crowd gathered at the Miller Auditorium at Western Michigan University in Kalamazoo. 

El-Sayed, for his part, echoed those remarks, saying that party leadership “is still pulling its punch on the fact that we are subsidizing a genocide in Gaza.”

“Maybe we should be using our taxpayer dollars, I don’t know, to build schools for our kids, rather than sending blank checks to foreign militaries who drop bombs on other kids,” El-Sayed said in his speech last weekend.

El-Sayed, a former health director in Michigan, is facing progressive state Sen. Mallory McMorrow and Rep. Haley Stevens (D-MI), a leading pro-Israel voice in the House who is favored by party leaders.

Sen. Susan Collins (R-ME) is criticizing Graham Platner, a Democrat running against her in next year’s election, for singling out AIPAC as a “weird” interest group in new remarks to a local newspaper published on Tuesday, where he pledged to decline support from the pro-Israel lobbying organization.

“Sen. Collins is a strong supporter of AIPAC, a bipartisan organization that promotes stronger ties between the United States and Israel,” Shawn Roderick, a spokesperson for Collins’ campaign, told Jewish Insider on Wednesday. “Nothing about their work is ‘weird’ — in fact, it has never been more important given the aggressive antisemitism that we have seen around the world since the appalling Oct. 7, 2023, terrorist attack.”

In his comment to the Midcoast Villager, Platner, a 40-year-old oyster farmer and Marine veteran who announced his bid to challenge Collins on Tuesday, noted that his campaign would reject backing from corporate super PACs and donations from interest groups such as AIPAC that he dismissed as “weird.”

“My view here is very simple,” Platner told JI on Wednesday when asked to elaborate on his initial comment, which had not been quoted in full. “What is happening in Gaza is a genocide, I refuse to take money from AIPAC or any group that supports the genocide in Gaza.”

In other interviews this week, Platner, a political newcomer, has similarly accused Israel of genocide in Gaza and also endorsed efforts to block U.S. arms sales to Israel.

AIPAC’s political action committee is backing Collins, in keeping with its commitment to defend friendly incumbents who are up for reelection. Collins, who is now seeking her sixth term, has been among her party’s leading moderate voices, pushing to maintain a bipartisan consensus on support for Israel.

Marshall Wittmann, a spokesperson for AIPAC, questioned Platner’s recent comment about the group in a statement to JI on Wednesday. “More than 12,000 Maine voters are members of AIPAC and advocates for a strong U.S.-Israel relationship who don’t think it’s ‘weird’ for Americans to engage in the democratic process,” he said. “We are proud to support Sen. Collins who is a stalwart champion of an alliance that benefits Maine and America.”

Still, Platner’s seemingly off-handed remark more broadly underscores a growing disconnect between AIPAC and the Democratic Party, where even some of the staunchest supporters of Israel have been put on the defensive amid an international uproar over the humanitarian crisis in Gaza.

In recent weeks, two Democratic House members who have received financial backing from AIPAC’s super PAC in their primaries, Reps. Maxine Dexter (D-OR) and Valerie Foushee (D-NC), both said they would support efforts to block transfers of offensive weapons to Israel. Foushee, for her part, also said earlier this month that she would not accept further support from AIPAC in her reelection campaign next year.

Meanwhile, Mallory McMorrow, a top Democratic candidate running for Senate in Michigan, revealed on Wednesday that she is urging AIPAC to refrain from engaging in the primary, where she is facing a strong pro-Israel advocate, Rep. Haley Stevens (D-MI), and a prominent left-wing critic of Israel, Abdul El-Sayed, who is backed by Sen. Bernie Sanders (I-VT).

The group declined to comment on McMorrow’s request. 

Even as AIPAC has been under attack, it has continued to maintain friendly relationships with Democrats and Republicans, hosting a number of freshman lawmakers from both sides of the aisle on trips to Israel this month.