Wednesday's presidential debate will test both Barack Obama and Mitt Romney's personal characters, but at least President Obama can go in knowing that it was his character that won over wife Michelle.

The First Lady spoke to Steve Harvey on his morning radio show Wednesday about her marriage, saying she married the president for his "character" but that she was reluctant to support her husband's political ambitions at first because "politics is one of those mean, ugly kinda things sometimes."

"I didn't want my husband to go through all of that," she told Harvey. "But then I thought, this is the kind of man, person, we want in office, and if I don't support him then I'm being really selfish."

Michelle's segment with Harvey coincides with the First Couple's 20th wedding anniversary, which is also Wednesday. In celebration, the president tweeted a romantic note to his wife, calling her his "best friend" and the love of his life, and later posted a photo of himself and Michelle on their wedding day. The First Lady responded with an equally sweet tweet. See screenshots of the tweets below.

The First Lady previously described her dream anniversary date to People, saying she would love to retrace the steps of the Southern California road trip she and Barack took on their honeymoon.

If you'd like to wish the Obamas a happy anniversary, the Obama-Biden campaign website is allowing voters to sign a digital anniversary card for the presidential pair.

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The Obama's twitter PDA is awfully cute, but it's nothing compared to their in-person affection. Click through the slideshow below to see the Obamas' sweetest PDA moments.

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  • August 2013

  • July 2013

    At the second annual "Kids State Dinner" at the White House

  • December 2012

    (Getty photo)

  • November 2012

    (AFP/Getty photo)

  • November 2012

    (AFP/Getty photo)

  • November 2012

    (Getty photo)

  • November 2012

    (Getty photo)

  • October 2012 after the final presidential debate

    (Getty photo)

  • October 2012 after the second presidential debate

    (Getty photo)

  • October 2012 after the first presidential debate

    (Getty photo)

  • September 2012

    (Getty photo)

  • September 2012

    (AFP/Getty photo)

  • September 2012

    (Getty photo)

  • August 2012 on the campaign trail in Iowa

    (Getty photo)

  • July 2012 at the USA vs Brazil basketball game

    (Getty photo)

  • September 2011 at the Phoenix Awards

    (Getty photo)

  • September 2011 heading to the UN General Assembly

    (AP photo)

  • September 2011 at the World Trade Center site

    (Getty photo)

  • May 2011 boarding Air Force One in London

    (Getty photo)

  • May 2011 at Westminster Abbey

    (Getty photo)

  • May 2011 at a Cinco de Mayo celebration

    (Getty photo)

  • May 2011 landing in England

    (Getty photo)

  • April 2011 heading to Chicago

    (Getty photo)

  • June 2011 on the South Lawn

    (Getty photo)

  • April 2011 during an event for the US military

    (Getty photo)

  • February 2011 at the National Prayer Breakfast

    (Getty photo)

  • January 2011 honoring the Tucson shooting victims

    (Getty photo)

  • January 2011 honoring the Tucson shooting victims

    (Getty photo)

  • December 2010 at the signing of the Healthy, Hunger-Free Kids Act

    (Getty photo)

  • October 2010 at a DNC rally

    (Getty photo)

  • September 2010 arriving home to the White House

    (Getty photo)

  • September 2010 at the Congressional Hispanic Caucus Gala

    (Getty photo)

  • August 2010 playing mini golf on vacation

    (Getty photo)

  • May 2010 on state visit to Mexico

    (Official White House Photo by Pete Souza)

  • Presidential Smooch on Team USA

    After a false start, President Obama and the First Lady puckered up for the "Kiss Cam" at an Olympic exhibition game.

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