Evidence that the Northern Federalists thought they could secede?
Very first page of a duckduckgo search.
And before you make some lame attempt at argument here, no they did not secede but they thought secession their right. It was quite openly discussed there.
So we’ve determined the root of your condition - you may be able to read but you have zero reading comprehension.
Yes, secession was one of many topics at the Hartford Convention. And yes, there were some participants who felt that they should secede. But no, secession was never an adopted conclusion of the conventioneers.
“The Hartford Convention resulted in a declaration calling on the Federal Government to protect New England and to supply financial aid to New England’s badly battered trade economy. It also advanced recommendations for a few Constitutional amendments, including requiring a two-thirds majority vote in order for war to be declared.”
Doesn’t sound like a call for secession to me.
https://connecticuthistory.org/the-hartford-convention-today-in-history/