(McKay Coppins, BuzzFeed) -- Mitt Romney's campaign has concluded that the 2012 election will not be decided by elusive, much-targeted undecided voters — but by the motivated partisans of the Republican base.

This shifting campaign calculus has produced a split in Romney's message. His talk show interviews and big ad buys continue to offer a straightforward economic focus aimed at traditional undecided voters. But out stumping day to day is a candidate who wants to talk about patriotism and God, and who is increasingly looking to connect with the right's intense, personal dislike for President Barack Obama.

Read more at BuzzFeed.