Start with the smaller account. For a leadership PAC, the rules are simple: There are none. Andrews can use the money for anything he likes.
"He can use those funds to buy a yacht and sail off into the sunset if he wants to," Ryan said.
The only thing preventing sitting lawmakers from doing so, he said, are House ethics rules and perhaps a desire not to offend donors. But once a lawmaker leaves office, the ethics provisions don't apply.
There are slightly more restrictions on the campaign account. The money in that fund can be used for nearly anything, except personal uses, according to Ryan (so no yacht). Even if Andrews donated the money to charity, it couldn't then be used to hire him or pay him, because that would violate the personal-use restriction, Ryan said.
But it could still be useful.
One increasingly common tactic - especially for lawmakers like Andrews who leave office but take jobs that involve influencing policy - is to keep the campaign account (with a new designation) and use it to parcel out donations.
"Most folks who are retiring from Congress but going into public affairs work, lobbying work, they usually keep the money. Cash comes in handy on Capitol Hill," Ryan said. "If you want access or phone calls returned, it helps to have a campaign contribution to offer."
Andrews is leaving Congress to lead the public affairs office at the Philadelphia law firm Dilworth Paxson.
Andrews can also donate an unlimited amount from his campaign fund to Democratic Party committees.
Or the money could be used for legal fees, if the fees are for an issue related to Andrews' official duties. Andrews has spent more than $220,000 on lawyers while facing a House ethics investigation into whether he used campaign money for personal expenses, though the investigation ends with his resignation.
"We're going to look at what the rules permit us to do and follow the rules," Andrews said in a recent interview.
Several other lawmakers from the region will face similar decisions when they leave Congress early next year.
Chester County U.S. Rep. Jim Gerlach (R., Pa.) had $851,792 in his campaign account and $12,427 in his leadership PAC, Keystone PAC, as of the latest filings. South Jersey U.S. Rep. Jon Runyan (R., N.J.) had $71,736 in his campaign account. U.S. Rep. Rush Holt (D., N.J.), who announced Tuesday that he would not seek reelection, has $309,356 in his House campaign account, $12,743 in a Senate campaign account from his run last year, and $18,190 in his leadership PAC.
Runyan and Gerlach are not seeking reelection but, like Holt, plan to serve out their terms.