Chicago ? U.S. Sen. Roland Burris provided incomplete and vague answers to state lawmakers investigating his controversial appointment by former Illinois Gov. Rod Blagojevich, but there is “insufficient evidence” to charge him with perjury, a county prosecutor said Friday.

Burris said the decision vindicated him of accusations he didn’t give lawmakers the whole story about how he got the Senate seat. Blagojevich was charged with trying to sell the seat a month earlier.

But the political fallout for Illinois’ junior senator remains.

Burris faces a Democratic primary challenge next year if he decides to seek election to the seat, and a Senate ethics panel in Washington is still reviewing the multiple explanations he has offered about his contacts with Blagojevich confidantes.