Last fall, my wife and I welcomed our second child, a son, into the world.  It’s great having two boys, but it doesn't set me up well to occupy the modern White House. 

With Barack Obama's inauguration, his daughters, Malia and Sasha, now live on Pennsylvania Avenue.  On November 24, 2008, Lois Romano wrote in the Washington Post (http://www.washingtonpost.com/wp-dyn/content/article/2008/11/23/AR2008112302555.html) that Desiree Rogers, the new White House social secretary, is "committed to making the White House a fun place for the Obama daughters." 

I'm wondering why it seems like Presidential children in the White House tend to be daughters.  Obama has two daughters and no boys.  So does George W. Bush.  So did Richard Nixon and Lyndon Johnson.  President Clinton had a daughter and no sons.