Meet the Three Best Friends Who All Ran for President

During their time in the Senate together, Arizona Sen. John McCain, Connecticut Sen. Joe Lieberman and South Carolina Sen. Lindsey Graham became close friends.

The three Senators, shown here in 2009, often appeared at each other's press conferences.

Shown here on a trip to Baghdad in 2006, the Senators were known as "the three amigos," after a 1980s comedy starring Steve Martin, Chevy Chase and Martin Short.

Though they have different temperaments, the three Senators have an easygoing rapport that's clear when they are together, as in this 2008 walk-through of the GOP national convention stage.

The three amigos, shown here at a White House summit in 2009, have something else in common: They've all run for president.

Lieberman ran for vice president in 2000 alongside Al Gore then mounted his own unsuccessful bid for the nomination in 2004.

McCain made an unsuccessful primary run in 2000 and then became the GOP nominee in 2008, where he was often accompanied by Lieberman and Graham on the campaign trail.

The three Senators watched the Super Bowl in a hotel lobby bar during the 2008 campaign.

Graham and Lieberman were with McCain as he barnstormed in the final 24 hours of his 2008 presidential campaign.

They even accompanied him on a campaign trip to Amman, Jordan, in 2008.

Graham is now readying his own bid for the Republican nomination in 2016.

Though Lieberman is a Democrat-turned-independent and Graham and McCain are Republicans, the three Senators, shown here on a 2010 trip to Afghanistan, share similar views on a muscular foreign policy.

The three Senators, shown here laying a wreath at the Yad Vashem Holocaust museum in Jerusalem, also share strong support for Israel.

After Lieberman left the Senate in 2013, McCain and Graham, shown here greeting former Secretary of State Henry Kissinger, continued to work together.

But they'll always be remembered as the "three amigos."