Most people know whether they are Republican or Democrat, and little things like the state of the economy or the candidate will not change their minds.

BBC: Elections help Obama. A bit.

But as a leader in Congress, as someone who's going to be in Iowa today, and as somebody who's a part of a Republican ticket led by Mitt Romney, this is an issue, I'm sure they know -- if they don't, they should know -- is on the minds of people not only across the state of Iowa, but across the country.

WHITEHOUSE: The White House

Nearly 50 percent of the Democratic Party primary voters there are black, and research shows that 40 percent of black women haven't made up their minds in the state.

CNN: Commentary: Barack Obama's black wakeup call

In the battleground state of Ohio, a recent poll showed that about nine in 10 voters have made up their minds.

CNN: SHARE THIS

To get a sense of what's on Pennsylvanians' minds ahead of the April 22 primary, NPR talked to voters at food markets across the state.

NPR: Swing Voters in the Heart of Pennsylvania

When Pew asked people why they had changed their minds about Clinton's performance in the latter half of January, 20 percent cited the State of the Union speech.

CNN: By Ronald D. Elving, CQ Staff Writer

Proponents of the singularity typically state that an intelligence explosion is a key factor of the Singularity where super-intelligences design successive generations of increasingly powerful minds.

FORBES: Technology, Digital Health and the Frankenstein Syndrome