(CNN) -- Kicking off a week-long push seen as outreach to independent and Democratic voters in crucial swing states, John McCain on Monday will deliver a speech outlining his vision for combating global warming. "We stand warned by serious and credible scientists across the world that time is short and the dangers are great," McCain will say in Portland, Oregon, according to prepared remarks. "The most relevant question now is whether our own government is equal to the challenge." McCain's commitment to fight global warming puts him at odds with some Republicans in Congress and with the Bush administration, which...