MINYANVILLE ORIGINAL On a slow trading day with government offices and the bond market closed in observance of Veterans' Day US stocks slipped narrowly into the red in mid-Monday trading after establishing slight gains in the morning as investors fretted over whether politicians would be able to come to a consensus on the fiscal cliff.   "Hopefully we'll be ready for the barrage of US political soundbites and opinions on how to come to an agreement between Democrats and Republicans " Peter Boockvar managing director at Miller Tabak told Reuters. "It may very well be the sole driver of ...