Over the weekend, on the campaign trail, President Barack Obama let his mask slip again.  The president's offhanded remark that voting is the best revenge betrays the anger in the man - and not just anger about a reelection in jeopardy. Under the carefully crafted façade of a healer and unifier, Barack Obama harbors resentments.  Millions of voters saw the president's smoldering anger and resentment breakthrough in his televised debates with Mitt Romney.  Aren't hardships and trials supposed to bring out the best in a man?