Late Sunday night, Public Policy Polling put out their last poll:

Scott Brown leads Martha Coakley 51-46 in our final Massachusetts Senate poll, an advantage that is within the margin of error for the poll. Over the last week Brown has continued his dominance with independents and increased his ability to win over Obama voters as Coakley’s favorability numbers have declined into negative territory. At the same time Democratic leaning voters have started to take more interest in the election, a trend that if it continues in the final 36 hours of the campaign could put her over the finish line.

Two other polls from little-known institutions came out in recent days. The first, conducted via telephone for Pajamas Media by CrossTarget, put Brown ahead 51.9 percent to 42.3 percent with 5.7 percent undecided; the second, conducted by the Merriman River Group (MRG) and InsideMedford.com, indicates that Brown leads Coakley 50.8 percent to 41.2 percent in the contest to fill the seat of the late Sen. Ted Kennedy. It’s fabulous if true, but there are those who are a little wary of Interactive Voice Recording instead of live interviewers. American Research Group, which has gotten pretty out there sometimes, has Brown up 3.

Hey, you know what we haven’t seen in a while? A Coakley lead.

UPDATE: Here’s another fascinating tidbit in PPP’s poll: Obama’s approval/disapproval is 44/43; Obama’s health care plan only gets 40 percent support, 48 percent opposition.

That’s not a formula for a presidential visit being the factor that saves Coakley.