Congressional Democrats began running radio ads yesterday accusing Rep. Brian Bilbray, R-Carlsbad, of supporting the Bush administration's “big oil” agenda.

The ads, paid for by the Democratic Congressional Campaign Committee, are part of an effort targeting 13 Republican incumbents whom Democrats consider vulnerable this year.

Bilbray was elected in 2006 to replace Rep. Randy “Duke” Cunningham, who was convicted of bribery and sentenced to federal prison. –J.M.