President Obama is back in Washington Saturday after visiting five different states, all of which are likely to be hotly contested in November. He expanded on some of the ideas he outlined in Tuesday's State of the Union address and offered a preview of the argument he'll be making in the general election. NPR's Scott Horsley reports.

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This week, Egyptians marked the first anniversary of the uprising that led to the ouster of President Hosni Mubarak. Deepening political divisions between pro-Islamist and secular protesters marred the event, erupting into violent scuffles. NPR's Soraya Sarhaddi Nelson reports.

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The future of the state of the U.S. housing market was a primary focus for the White House this week. On Tuesday's State of the Union address, President Obama unveiled a new plan to try to correct the housing downturn. It would allow qualifying homeowners the chance to refinance their mortgages at historically low rates.

Republican candidates' efforts to win Hispanic voters have intensified in advance of the Florida primary, airing ads in Spanish and contending over immigration. Host Scott Simon speaks with Maria Elena Salinas, co-host of Noticiero Univision, about Hispanic voters' role in the Republican primary and the upcoming presidential election.

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This is WEEKEND EDITION from NPR News. I'm Scott Simon. We begin with the latest in the Republican race for president. Former House Speaker Newt Gingrich and former Massachusetts Governor Mitt Romney campaigned in Florida yesterday. Mr. Gingrich made appearances before two communities whose votes he hopes to win in Tuesday's primary. He spoke to Latino home builders and businesspeople in the morning, and had a rally with a group of Republican Jewish voters in the afternoon. NPR's Brian Naylor reports.

Martin Mull and Fred Willard are comic partners in many minds. They helped create Fernwood Tonight in the late 1970s, and while they went on to solo careers in films and stage, they were reunited to play one of TV's first gay couples on Roseanne. Host Scott Simon sat down with the duo for the public television show Backstage With.

I will watch the Super Bowl next weekend, along with several billion other people. I expect to cheer, shout and have some guacamole.

But as a fan, I'm finding it a little harder to cheer, especially for my favorite football and hockey players, without thinking: They're hurting themselves.

Not just breaks and sprains but dangerous, disabling brain damage.

Think you know how to avoid overeating? Think again.

Research suggests that choices, like how much to eat during a meal, are often made subconsciously. Trouble is, our brains are hard-wired to mislead us in lots of little ways, which can have a big impact on our diets.

Take the Delboeuf effect, an optical illusion first documented in 1865. It starts with two dots of equal size. But surround one dot with a large circle and the other dot with a small one, and suddenly the second dot looks bigger.

The argument over whether voters should have to present photo identification at the polls usually splits along party lines. Republicans who favor the requirement say it prevents ballot fraud. Democrats and election rights groups who oppose it say it is meant to suppress turnout.

And people of all political stripes wonder what all the fuss is about.