Search US federal political committees (PACs, super PACs, party committees, candidate principal committees, leadership PACs, etc.) via the OpenFEC API. Filter by q (name match), committee ID, candidate ID (returns committees linked to that candidate), committee type (P=Presidential | S=Senate | H=House | X=Independent expenditure-only | Y=Party | Z=National Party non-federal), designation (A=Authorized | J=Joint fundraising | P=Principal | U=Unauthorized | B=Lobbyist/Registrant PAC), state, party, cycle, organization type (C=Corporation | L=Labor | M=Membership | T=Trade | V=Cooperative | W=Corp without stock). Returns FEC committee ID, name, type/designation/organization labels, state, party, treasurer, linked candidate IDs, cycles, affiliated-committee names, first/last file dates.