Cautious Dem Senate candidate falls behind as Marsha Blackburn goes on offense in Tennessee
'I wouldn't vote for him. He's got no charisma, no power, no anything'
Bredesen's campaign treasurer is on TVA board of directors, appeared in campaign ad
Tennessee Democrat has attempted to portray himself as pro-gun, is opposed by NRA
Bredesen trots out treasurer to defend record, fails to disclose her role in campaign