A brilliant column by Kevin Cullen of the Boston Globe, in anticipation of today's US Senate race.

Blue Hill Avenue runs like a vein through the city.

It stretches for 4 miles, from River Street in Mattapan to Dudley Street in Roxbury, and a little more than a year ago there was an Obama sign on every block. There were Obama signs in Mattapan barber shops, in the windows of the apartment buildings opposite Franklin Field and Franklin Park, in the restaurants of Grove Hall, in the bodegas near Jermaine Goffigan Park.

Fourteen months ago, there was a buzz on Blue Hill Ave. and the streets that run off it like caterpillar legs. This is the heart of the biggest minority community in the state, and the energy generated by the prospect of Barack Obama becoming president was palpable.

Yesterday, I drove the length of Blue Hill Ave. and counted exactly two Martha Coakley signs. One of them was on a fence next to the Roxbury Energy Gas station, on the corner of Moreland Street. The sign wasn’t properly fastened. It flapped in the wind, revealing a “Mike Flaherty for Mayor’’ sign underneath.

If Martha Coakley loses today, it won’t be because she didn’t put up enough signs on Blue Hill Ave. It’ll be because she failed to convince enough of the people who put up the Obama signs on Blue Hill Ave. and a lot of other avenues across Massachusetts that Obama’s ability to get anything done depends on her winning the election.

Blue Hill Avenue voted for Barack Obama in 2008. Blue Hill Avenue voted for Deval Patrick in 2006--"Together We Can" and "No Ordinary Leader" signs were in virtually every storefront in late-October and early-November of that year.

Think about that as you go into the voting booth today.

UPDATE: Please be sure to join us Tuesday for a special Election Night edition of The Notes on Blog Talk Radio beginning at 8:00pm EST. We will be joined by Stephanie Davis of RFC Radio and Paul Couturier of Blog Talk Radio. Plus, more from WBUR, the Globe and Herald.