Vulnerable GOP senator breaks with Trump on 2 key issues as Vance makes stop without her

Sen.Susan Collins of Maine, a moderate Republican seeking re-election in a blue-leaning state, is not joining Vice President JD Vance on Monday as he stops in her home state of Maine.Collins, who at times has opposed President Donald Trump's legislative priorities, is a top target for Democrats this year as she runs in a midterm race that's among roughly a dozen that will determine if the GOP holds onto its slim Senate majority.Vance's stop in Maine comes as Collins opposes Trump's move this past weekend to impose 50% tariffs on a range of goods from Canada, which shares a long border with Maine.

And the senator is also opposed to new U.S.Postal Service rules that, if implemented, could rein in mail-in voting.The vice president on Monday delivers remarks in Brewer, Maine, at Compotech, a defense technology manufacturer.

It's the second stop this year by Vance in Maine and the second time that Collins has not teamed up with the vice president.SUSAN COLLINS DROPS BRUTAL REMINDER OF DEMOCRAT CHALLENGER ROCKED BY ACCUSATIONSRepublican Sen.Susan Collins, left, said scheduling conflicts prevented her from joining Vice President JD Vance in Brewer, Maine.

(Al Drago/Bloomberg via Getty Images; Brendan SMIALOWSKI / AFP via Getty Images)"I am already scheduled on Monday, so I will not be able to join the vice president," Collins told reporters on Saturday.The Senate was in session when Vance held an event in Bangor, Maine, in May, and Collins stayed in Washington.The senator holds a historic attendance record of casting over 10,000 consecutive roll call votes in the Senate dating back three decades.But Collins, speaking to reporters as she marched in the annual Madison-Anson Days parade, her seventh parade this summer, highlighted that she teamed up last week with Energy Secretary Chris Wright when he stopped in Maine to tour a federally funded battery storage project in Lincoln built on the site of a closed paper mill."I really appreciated Secretary Wright's presence," C...