It appears that the good Senator Collins is objecting to the Tom Allen campaign sending a staffer to follow her public appearances and video what she says.
Standard operating procedure for campaigns these days, and a great way of showing how a candidate talks out of both sides of their mouth.
Collins’ problem is that she’s been Bush’s bitch. When push comes to shove, she’s never voted against him. Her “bipartisanship” consists of joint pressers with Lieberman.
That’s how she guarantees no real opposition to her in the primaries (all of Bush’s support is from the party faithful), but she can’t go and talk to small wingnut audiences and tell them what a loyal Bushie she is if those speeches end up on Youtube.