A Democratic source with knowledge of the buy said the PAC will spend at least $500,000 more on the buy, to continue airing an ad it launched attacking Gabriel Gomez (R) on his position on Social Security and his support for raising the retirement age. Gomez backs a plan, proposed by President Obama, to change the way Social Security benefits are calculated, and it would likely cut benefits.
That brings the total the PAC is spending on the race to an estimated $1 million.
Senate Majority PAC's increased buy reflects that concern. But Democrats insist they're confident Markey will win and that they're simply taking nothing for granted.