Sean B. Bunny doesn’t seemed fazed by any of Chris Collins' advantages as an incumbent congressman.

Not the appearance of Vice President Pence here this week to raise $400,000 for Collins and other Republicans in Buffalo.

Not the flashing lights motorcade that whisked Collins and the vice president around Erie County.

Not a healthy Collins campaign fund, nor even the congressman’s close political relationship with President Trump.

None of it dissuades Bunny, an Army veteran of Iraq who recently served as Erie County assistant district attorney. He announced Wednesday he will seek the Democratic nomination to challenge Collins in 2018, setting up a potential battle against a powerful incumbent hampered by a congressional ethics investigation.

“I don’t think he really cares about the people of Western New York, and the ethics issues are very serious,” Bunny said of Collins. “There is reason to believe he broke ethical rules, and that’s troubling.”