A new American Research Group poll in Pennsylvania shows Sen. Hillary Clinton leading Sen. Barack Obama, 52% to 41%.
Key findings: Obama leads among men 59% to 38% and Clinton leads among women 63% to 27%. Clinton leads among white voters 63% to 29% and Obama leads among African American voters 89% to 7%. African Americans account for 18% of likely Democratic primary voters. Clinton leads 47% to 45% among likely primary voters under 50 and she leads 58% to 37% among likely primary voters 50 and older.