Democratic lawmakers from New York have proposed a radical response to Donald Trump’s potential return to the presidency: secession from the United States.

State Sen. Liz Krueger (D-28) is advocating for a coalition of northeastern states to break away from the Union and join Canada, citing concerns about the direction of the country under Trump’s leadership.

Krueger, who chairs the Senate Finance Committee, is also suggesting a bold financial move—holding back up to $300 billion in federal taxes from Washington. She defended her ideas in an interview with Politico, saying, “It’s not unreasonable to think outside of the box.”

The senator’s plan isn’t new. Back in September, she hinted at the possibility of a four-state coalition—New York, Massachusetts, Vermont, and Connecticut—seceding to become the south-east province of Canada if Trump reclaimed the presidency.

In a discussion with City & State New York, she outlined her vision for what some are calling an unprecedented act of rebellion:

I know that Canada has basically said, “Yeah, we’re not letting you all in if he wins.” As individuals, they basically made it clear. But that’s why I thought, “Oh, why do I have to leave this country? I love this country, and if Trump wins a second term, it’s not actually my fault or people in New York.” So I thought I would suggest to Canada that instead of us all trying to illegally cross the border at night without them noticing, which is pretty hard because there’s a lot of us, that they should instead agree to let us be the southeast province, a new province of Canada, and I offered, even though I hadn’t gotten agreement from other states yet, that I thought New York, Connecticut, Massachusetts, Vermont, would combine and be a great new province as the southeast province of Canada.

“Basically everybody in these states are progressive Democrats” and they “would fit in pretty well with the political philosophy of at least most of the Canadian elected officials,” she contended.

Krueger, whose district includes the Upper East Side and Midtown Manhattan, has even floated the idea with connections who say politicians in Ottawa could back it:

I propose that this could be an option, and I got back some unofficial responses and heard this is probably sellable in Ottawa, and look, if we were Europe, in the length of time we’ve been a nation, for Canada, if we were European countries, our borders would have moved around 20 times by now, right?

While Krueger plots to counter Trump in any way she can, Trump has made clear that he is willing to work with the New York Democrats to restore the state to greatness.