(CNN) - Sen. Arlen Specter continues to stockpile cash ahead of what's likely to be a difficult re-election battle.
Specter's campaign announced Wednesday it raised over $1.8 million over the last three months, and ended the latest reporting period with $8.71 million in the bank.
The announcement means that Specter - who switched parties in April to become a Democrat - outraised Republican challenger Pat Toomey, who collected over $1.5 million during the same period. Specter's Democratic primary opponent, Rep. Joe Sestak, has not yet released his third-quarter fundraising totals.
Specter's campaign noted that President Obama's fundraiser for the incumbent in September netted "about a million dollars" for the Democrat.