The statement is FALSE because Graham Platner is not the presumptive Democratic nominee for any major 2026 Senate race; the actual presumptive Democratic nominee challenging Susan Collins in Maine is David Costello, not Graham Platner. Additionally, while Chuck Schumer and Kirsten Gillibrand have criticized Susan Collins, the specific quoted language about her being 'never been more vulnerable' and working with 'Graham Platner' appears to be fabricated or misattributed.

No record exists of Chuck Schumer or Kirsten Gillibrand making the quoted statements about Susan Collins being 'never more vulnerable' or working with a Democratic nominee named Graham Platner; Graham Platner is not a known political figure, and the Intercept has not published such a quote.

There is no credible evidence or record of Chuck Schumer or Kirsten Gillibrand making those specific remarks about Sen. Susan Collins; the cited source does not contain such a quote.

The statement contains factual inaccuracies, including the mention of 'Graham Platner' as a presumptive Democratic nominee, which does not correspond to any known political figure in Maine politics.