Any one want to hazard a guess as to why the Clinton’s chose not to use this against him at a time when it would have done some good?
Bill Gwaltney's murder.
I think the simplest answer is the NBC issue is too nuanced for most of the mouth breathing public to understand. Add to that the media's fawning adoration of "the One" and you get why this issue would have had no legs. The media outright ignored the shenanigans that were occurring during the caucuses, why would they pay any attention to this?
The biggest enemy to freedom loving Americans is the POS media that determines what most people see and read for their daily information.
Now, however, with 3 plus years of anti-freedom, regulatory BS, anti-growth and still high unemployment, most people that would have ignored this before might be receptive in listening.
“..why Clintons chose not to use this against him..”
They were threatened by Soros and DNC. Read Gold and Silver Exchange article about secret meeting of Congress on March 12, 2008 telling the future if Obama opposed.
Because their entire party was against them. Remember, Uncle Teddy was feuding with the Clintons and backing OsamaObama.
The Clintons knew it was over when the party took actual votes cast for Hillary in FL and gave them to OsamaObama because he didn't feel like campaigning there.
They knew they would have lost the required 95% black vote.