San Francisco Chronicle: House Republicans, who’ve been hounding Speaker Nancy Pelosi for weeks over her refusal to allow a vote on new domestic oil drilling, are plotting a high-stakes confrontation this fall that could spark a shutdown of the federal government. Republicans see an opportunity when Congress returns Sept. 8 and will have to pass a temporary measure to keep the government funded beyond Sept. 30. Democrats are likely to include in the measure an extension of the congressional moratorium on …