President Obama just did some hip-hop level trash-talking, and Hillary Clinton was his target.
The Prez took the shot during a news conference from the White House ... when he was asked what the Dems can learn from Donald Trump's huge victory in the Electoral College.
He didn't parse words in explaining why he won certain battleground states that Hillary lost. In a nutshell ... her math sucked in states like Iowa -- where she only visited 3 times after the Caucus.
This won't be well-received in the Clinton's living room. Truth hurts?