2020 candidates are campaigning across the US today. Follow the latest updates ...

At a roundtable with Americorps alumni in Manchester, New Hampshire, Sen. Kirsten Gillibrand talked about her idea to expand the GI Bill to make national service a priority, and how her plan would help young adults pay for college.

In the New York senator's plan, a young person would work in health care, education, military service, as a first responder or in a green job for one or two years, and depending on how long they worked, they would have two or four years of their college paid.

In a gaggle following the event, Gillibrand said this plan would pay for itself, despite critics who say that a plan like this is too expensive, because “you’re turning either low wage or unemployed workers, or unemployed workers or young people into our employees of the future, that are actually, our workers of the future, that are actually going to pay more in taxes and create a growing economy.”

Former Massachusetts Gov. Bill Weld, in an interview Saturday on CNN's "Smerconish," compared Trumpism to the Know Nothing Party, a anti-immigrant movement that grew during the 1850s in the US.

"I've never left the party of Lincoln," Weld replied. "When I started in Republican politics, which was way back in the 60s, people listen to each other. Policy was made in Washington by hammering things out and yes, compromising. But a lot got done."

"Trumpism is a natural air of the Know Nothing Party of the 19th century, which like the Trumpism, was founded on anti-immigrant fervor. They hated in that case Catholics, the Catholics coming in from Germany and Italy. They had violent rallies, just like Trumpism. They believe in conspiracy theories, just like Trumpism. And that party just disappeared into the mist. And I think the same thing is going to happen with Trumpism. I think this is, you're right--it's a flash, a real flash in the pan. But I think it's gonna wind up being that when the sober second thought of the community kicks in."

Weld ran in 2016 for vice president on the Libertarian Party ticket with Gary Johnson. In February, Weld launched an exploratory committee to run in 2020 as a Republican.

Weld also told CNN Trump was not knowledgable on climate change, energy or immigration, but "simply repeats his buzzwords."

"Before he was elected President of the United States, he was a New York City and Palm Beach socialite, judging beauty contests and employed in the reality TV industry. That's no preparation, with all respect, for being the President of the United States. I'm not saying it's his fault. I'm saying he's kind of a fish out of water. And I think as the campaign goes on, that idea is going to take root."

Former Massachusetts Gov. Bill Weld, who's exploring a primary challenge against President Donald Trump, told CNN's Michael Smerconish that he's likely to formally launch his 2020 campaign sometime in April.

"I think month of April," Weld said on Saturday. "It does pay to get your ducks in a row before you formally announce. My sense is by some point in the month of April, the stars will be in alignment."

Weld said his "intention is to win" against Trump in a Republican primary.

"There’s no point doing something like what I’m about to do unless you intend go all the way and win," Weld said. "I thought candidly for the last 10 or 15 years that I could start Monday in that job at 1600 Pennsylvania."