Barack Obama released a flurry of ads today targeting the economic concerns of voters in swing states. One ad, airing in Michigan, focuses on alternative energy sources and McCain's support for tax breaks for oil companies. Another, also airing in Michigan, attacks McCain for his support of George Bush's plans to privatize Social Security. Another ad, for Pennsylvania, attacks McCain for supporting tax cuts for companies that send jobs overseas.

Obama's Michigan ad on alternative energy:

Obama's ad on Social Security:

Obama Ad "Sold Us Out" about outsourcing:

Democrats have often claimed that Republicans will damage Social Security. This 1964 ad "Social Security" is from Lyndon Johnson's campaign against Barry Goldwater: