Sen. Susan Collins, R-Maine, holds a blanket as she walks off the Senate floor after the Senate stayed in session throughout the night at the U.S. Capitol Building in Washington, July 1, 2025. Andrew Harnik | Getty Images News | Getty Images Maine might send Sen. Susan Collins packing after this year's midterm elections . That decision could come back to bite the Pine Tree state's balance sheet for years to come. Collins, New England's lone federally elected Republican , is in the fight of her political life against the Democratic progressive upstart candidate Graham Platner . Platner, an oyster farmer and military veteran, has seized on anger directed at President Donald Trump and anti-establishment animus to rocket to the Democratic nomination — forcing Democratic Gov. Janet Mills to abandon her own Senate campaign within a matter of months.…