PORTLAND, Maine — Maine State Treasurer Bruce Poliquin is giving his Senate campaign treasury a boost.

Documents filed with the Federal Election Commission indicate he has raised more than $229,000 through May 23. And he provided nearly half of that himself. The FEC filings indicate Poliquin gave $109,000 to his campaign.

The pre-primary filings from all candidates aren’t yet available.

The ones that were available showed Charlie Summers raised $89,915 and William Schneider $76,222 among Republicans.

All told, there will be 10 candidates — six Republicans and four Democrats — on next week’s primary ballot for U.S. Senate.