Manhattan wannabe congressman Jack Schlossberg is ramping up his reliance on his slain grandfather and former President John F. Kennedy to raise more campaign cash.

“Lately, I’ve been doing some reflecting on my grandfather, President John F. Kennedy, and his legacy of hope. In my run to fight for NY-12 in Congress, and just as a person, that’s what I want to focus on. Hope,” Schlossberg, 33, said in a March 5 e-blitz plea for election dough.

“My name is Jack, or John Bouvier Kennedy Schlossberg if you want to know the whole thing,” he said, even invoking the surname name of his beloved late grandmother, Jacqueline Bouvier Kennedy Onassis, too.

Schlossberg is one of many candidates running in the June Democratic primary to replace Rep. Jerrold Nadler in the 12th House District, which encompasses the West and East sides of Manhattan.

In a March 4 e-solicitation, he said, “Jack Schlossberg here — candidate for Congress in NY-12.

“Donald Trump just announced he’s going to rename the Kennedy Center after HIMSELF…This isn’t the first time Trump has tried to erase my grandfather President Kennedy’s legacy, and it won’t be the last.”

On March 2, Schlossberg added in an appeal for campaign dollars, “In high school, I spent hours watching my grandfather’s speeches.

“He taught us all that politics isn’t about serving yourself — it’s about serving others. When we fight for hope, we’re not just doing it for ourselves, we’re doing it for each other and the future we all have to share.

“I know I have big shoes to fill. In my grandfather’s memory, I’ve led a life of caring about this a lot. I put that care and effort and hope into everything I do. But this is bigger than me. It’s bigger than my family’s legacy,” said Schlossberg, whose mother is John and Jackie’s daughter Caroline.

Several other of his fundraising solicitations were nearly identical, too.

Schlossberg had already mentioned JFK in his first official campaign fundraiser announcing his candidacy.

“I’m running to represent NY-12 in Congress! This is the district where I was born and raised, and the place that five generations of my family have called home,” Schlossberg said Nov. 17.

“I’m Jack Schlossberg, and my grandfather, President Kennedy, is my hero.”

The former president was assassinated Nov. 22, 1963.

“This will forever be known as the dead grandpa campaign. It’s outrageous,” said veteran political strategist Hank Sheinkopf.

“You have to be 80 years to remember JFK. It’s not a growing demographic group.”

But Schlossberg said he connects with voters when he mentions his grandpa, JFK, because everyone loves their grandparents.

“I have two grandfathers — one was president of the United States and the other was president of his temple on the uptown,” Jack said, the latter being Alfred Schlossberg, his father’s father.

“The generations who built NYC and the USA deserve to be acknowledged,” Schlossberg said.

“I love asking people about their grandparents. That’s when they light up.”

There’s snow job too small for these neighborhood heroes.

Two Manhattan buddies are going viral for clearing nearly 30 local businesses’ and residences’ sidewalks the day after Jan. 25’s monster snow storm – free of charge.

NoHo resident Andrew Psomas told The Post he watched the mammoth snowfall predictions from Winter Storm Fern mount beforehand, so the self-described artist called pal Danny Reed – an adventure athlete and content creator – at 9:30 p.m. the day before to see if he was on board to join him in his effort.

Psomas said the pair began shoveling snow at 6 a.m. Jan. 26 with the simple goal of clearing as many sidewalks as possible before work.

“I was shoveling snow for this building I’ve been close with for a while — and as I was shoveling snow, it just brought me back to when I was shoveling as a kid,” said Psomas, 31, of the inspiration behind the good deed.

“A lot of people don’t have the capability to shovel snow for themselves. People die from heart attacks while shoveling snow. There’s also elderly people that just need to get around,” he said.

“All this was going on in my head while I was shoveling, and I just thought, ‘I need to do this.’ But one person shoveling is not as fun as two, so I called up Danny because Danny is always down for something fun.”

The pair cleared a whopping 30 sidewalks outside businesses and residences on Bleecker Street in NoHo before 9 a.m., he said. The grueling work took about three hours.

The Pizza Box on Bleecker Street shoveled its own sidewalk but kept the pair’s goodwill going by gifting them with a free pizza.

“Saw you in our hood! We shoveled our own sidewalk, but our customers appreciate you,” the business wrote on Instagram. “We want to treat you to a pizza on us! Great job! It’s hard work.”

Psomas said, “There’s a great sense of community in the city and everyone’s always helping each other out.

“I’m not going to wait for the snow to do something nice.

“We just wanted to create a situation where the streets would be open for all people and people could get about their business,” he said.

–Additional reporting by Greg Carlton