 October 2011 polling showed Brown 's approvals had fallen and he faced a competitive re @-@ election if matched against Democrat Elizabeth Warren . However , his numbers in early March 2012 showed he led Warren by 8 points in the polls . In March 2012 , Brown 's lead had narrowed to 2 @.@ 3 % , within the margin of error . As of September 2012 , several polls showed Warren with a lead over Brown ( with one still giving Brown an edge ) . 
