anchor: The Bush and Clinton administrations kept spending billions on drug prevention, but the frenzy of the 1980s dissipated, and the culture changed.
positive: The frenzy of the 1980s dissipated, and the culture changed; before, the Bush and Clinton administrations kept spending billions on drug prevention.
negative: Luckily, only millions were spent on drug prevention by the Bush and Clinton government; we could have lost billions.