An individual donor can give a maximum of $4,800 to Arlen Specter's bid to win a sixth term to the U.S. Senate. But Pa has no caps on giving to state races, which has allowed wealthy school choice advocates to pump millions into Anthony Williams' late-starting gubernatorial campaign.

Tom Infield at the Inquirer reports on the donors putting a half-million more into Williams' coffers since last week:

A political-action committee largely bankrolled by the trio gave an additional $975,000 last month to the Williams campaign. The PAC also paid a $200,000 TV bill for Williams.

Now comes word that the same PAC - called Students First - has chipped in an additional $515,000.

On May 3, according to campaign-finance reports filed with the Pennsylvania Department of State, Williams was down to his last $127,000.

Three days later, last Thursday, Students First contributed $515,000.

Here's Barry Kauffman at Common Cause:

"It creates some serious concerns as to whether a tiny, tiny handful of donors giving massive amounts of money can launch a candidate from nowhere. . . . Is this healthy for our system or not?"