A handful of House Democrats plan a long-shot effort to snarl President Bush’s formal re-election by preventing Congress from counting Ohio’s pivotal votes when lawmakers tally the electoral vote Today. In order to force Congress to act on a challenge to the election’s legitimacy, the Representatives would need one Senator to endorse the complaint. Rep. John Conyers has sent letters to senators seeking their support for his plan to object to the counting of Ohio’s 20 electoral votes, which gave Bush his November victory over Kerry. The House Democrats’ chief hope of finding a supportive senator may be Sen. Barbara Boxer. Her spokesman said Tuesday that she has been asked to sign the complaint and “she is considering it.” John Kerry wrote a letter to supporters yesterday saying he would not object to the certification of the vote. Should a senator and House member formally challenge a state’s results, the two chambers must meet separately and consider the objection. That scenario would still ensure Bush’s re-election because both bodies are controlled by Republicans.