A new American Research Group poll in Pennsylvania shows Sen. Hillary Clinton leads Sen. Barack Obama, 51% to 39%.
Key findings: Obama leads among men 51% to 38% and Clinton leads among women 61% to 30%. Clinton leads among white voters 60% to 30% and Obama leads among African American voters 83% to 11%. Obama leads 46% to 43% among likely primary voters under 50 and Clinton leads 60% to 32% among likely primary voters 50 and older.