Summary
An Obama-Biden radio ad hammers McCain for being opposed to stem cell research. Not true. Meanwhile two spots from the McCain-Palin campaign, together with the Republican National Committee, describe McCain’s support for the research; they’re largely accurate.
By saying that "John McCain has stood in the way – he’s opposed stem cell research," the Obama ad seriously misstates the view that McCain has held on this issue since 2001, when he began backing embryonic stem cell research,