I've been in numerous (too many!) conversations recently regarding the sticky political situation for any politician to oppose any DUI legislation. Such opposition too easily gets twisted to "he supports drunk driving."
Much of the rat race to .08 can be traced to the amazing power M.A.D.D. has in regards to lobbying and influence. No one - and I mean no one - wants to get on the wrong side of M.A.D.D. when running for office.
I'm no longer convinced that .08 is an impaired situation in and of itself when compared to other impairments (texting, eating, children going crazy in the back seat, loud music, general freaking inattentiveness, etc.)
Studies regularly show that accidents, injuries, and fatalities - to one's self and others - continue to occur at levels above .10. Many of these accidents occur well above .10, such that I'm not convinced anyone has shown a clear difference between consequences at .08 and .10. In other words, this seems to be mostly an issue of semantics. One is "drunk" at .08 because the law defines it as such.
[Yes, reaction time and coordination is worse at .08 than .00, I'll give everyone that. But it can't be any worse than the times I've jumped awake from a dead sleep and got right in my car. Spent my high school years doing that. Talk about down-right scary, in the pitch-lack of I-65 in Bulliet County!]
The most interesting issue here, I think, is the role of the serving establishment in this whole mess. If they are not legally to serve peoples who are "visually intoxicated" than many, many of the people being served are being done so illegally. I've been disturbed recently by how many CLEARLY intoxicated people I have seen being served at various local establishments. While I'm willing to bet it is very hard to visually "see" .08 intoxication, the levels at which serious accidents are happening have to be easier to see.
As a society we need to agree on a level which actually represents impairment. This shouldn't be a race to the lowest number just because we can. Then, at this level, we need to implement serious penalties. The ability for people to acquire multiple DUIs is incredible and beyond my ability to comprehend.
With .08 we have arrived at a point where any drinking while driving is getting-right-near drunk driving. Which is rough, considering our love of and dependence on the motor vehicle. You know what would solve all this. A good light-rail system.

Thinks the frosty mug is the low point in American history.