NEW : Watch what Obama says about McCain 's role in the situation » . Sen. Barack Obama lays out his plan to avoid another economic crisis . NEW : Obama : ` I will not let Wall Street wreck Main Street. Sen. John McCain expresses reservations about government 's rescue plan . McCain says there should be a bipartisan oversight board .
NEW : Sen. Barack Obama lays out his plan to avoid another economic crisis . NEW : Obama : ` I will not let Wall Street wreck Main Street. Sen. John McCain expresses reservations about government 's rescue plan . McCain says there should be a bipartisan oversight board .