Calling it his most successful fundraising quarter to date, former Rep. Pat Toomey (R-Pa.) announced Monday he raised $2.3 million in the last three months. The former congressman now has more than $4 million cash on hand, according to his campaign.

Toomey is running for Pennslyvania's Senate seat.

Sen. Arlen Specter (D-Pa.), who rode along with President Obama to the National's home opener, and Rep. Joe Sestak (D-Pa.), who's challenging Specter in the Democratic primary, have yet to release their first quarter numbers.