HARRISBURG (AP) — Democrats in Pennsylvania are challenging the paperwork filed by the state Green Party to get its candidate on the fall election ballot for president and several statewide offices. Monday’s court filing said the Green Party’s paperwork contained numerous illegible signatures, signatures of unregistered voters and other problems. The filings contained about 8,550 signatures. The legal threshold is 5,000 signatures of registered voters. A state Green Party co-chairperson, Sheri Miller, said the Democrats’ challenge is an “attempt to remove any non-corporate-backed competitors from the ballot and to limit voters’ choices.” The Libertarian Party also filed paperwork to get its presidential nominee on the fall ballot.