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GOP candidates clash in Colorado

Trump and Carson at debate

Justin Sullivan/Getty Images

Sparks flew between the Republican candidates for president during two debates held Wednesday night in Colorado.

GOP presidential debate takeaways

Senate debate CNBC

Andrew Burton/Getty Images

The top 10 leading GOP candidates debated for more than two hours in Boulder, Colorado on Wednesday night. Here are takeaways from the debate.

Paul Ryan's run for Speaker of the House

Paul Ryan 2

Win McNamee Getty Images

Rep. Paul Ryan announced Thursday that he is officially running for speaker of the House, and he is likely to be elected next week.

Sanders, Clinton dominate Dems debate

Sanders speaks, Clinton looks on

Adam Rose/CNN

Democratic presidential candidates Hillary Clinton and Bernie Sanders dominated the stage at their first debate Tuesday night.

5 closest U.S. presidential elections

Bush wins 2000 blurb

Joe Raedle/Getty Images

Here are five of the closest presidential races in U.S. history since 1840 as compiled by Yahoo!.

Which presidents were most unhealthy

White House file

Alex Wong/Getty Images

The health of a president can change the attitude of a nation -- or the course, if he dies. Take a look at how healthy some of our past leaders were.

10 most athletic presidents

Athletic Presidents - Obama

Pete Souza/White House via Getty Images

Find out who are the buffest bodies to sit in the Oval Office.

Celebs react to first presidential debate

Romney-Obama debate

Pool

See what some of the biggest names on Twitter were saying about the presidential debate on Wednesday night.

First ladies and their causes

Michelle Obama teaser

Joe Raedle/Getty Images

First lady Michelle Obama worked out with trainers from "The Biggest Loser" at the White House as part of her national Let's Move! initiative. Take a look at…

Actors who have played presidents

Michael Douglas in 'The American President'

Columbia Pictures Image

Many actors over the years have been elected to play the highest office in the land in film and television. Here's a look at some of them.

America's Least Likely Presidents?

George W. Bush

Dennis Brack-Pool/Getty Images

Which of America's presidents would have been named "least likely to succeed" by their high school classmates?

Scenes from Super Tuesday

Tennessee Primary

10 spectacular political meltdowns

Howard Dean

John Mottern/Getty Images

The collapse of a politician is often a painfully public process. Here are 10 famous breakdowns.

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