U.S. Sen. Bob Casey had $5.6 million in his campaign account at the end of June after raising $2.6 million during the previous three months, according to new Federal Election Commission reports from him and other federal candidates.

The Pennsylvania Democrat is up for re-election next year and has attracted a broad field of primary challengers that may continue to grow (U.S. Rep. Lou Barletta, R-11th District, told the Philadelphia Inquirer last week that he still hasn’t decided on whether to launch a Senate bid).

Among the Republicans who have stepped up to challenge Casey, Montgomery County real estate developer Jeff Bartos appears to have largest campaign coffers so far: he reported having $1 million on hand, a total that includes $500,000 that Bartos loaned his campaign.

Paul Addis, a former energy executive, reported $102,000 on hand at the end of the quarter, including a $100,000 personal loan.

State Rep. Rick Saccone of Allegheny County, one of two state lawmakers in the race, has $30,000 after loaning himself $11,000. Rep. Jim Christiana of Beaver County reported $22,000 on hand, after a $3,500 personal loan.

Last year’s U.S. Senate race between Republican Pat Toomey and Democrat Katie McGinty was the most expensive in history. Pennsylvania’s race is not yet among those rated as most competitive next year, but Casey’s seat is one of 11 that Democrats are defending nationally — and Trump’s surprise victory last year could put a larger target on the state.

lolson@mcall.com

Twitter @LauraOlson

202-780-9540