They were defeated, at least temporarily, in 2010, but they haven't given up the fight.
Meanwhile, lawmakers who support tighter gun laws say they haven't given up trying to pass legislation.
That said, they haven't given up on looking for such a legally enforceable guarantee mechanism.
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But cardiologists haven't given up on old-fashioned heparin, which is often used in combination with other anti-clotting drugs.
"The great thing is that we haven't given up, " he told BBC Sport.
Dow's engineers haven't given up yet and they are now trying to land some business making parts for refrigerator manufacturers.
"We certainly haven't given up and thrown the towel in, we're meeting with the council next week, we're putting an appeal together, " he said.
And even though it's been a very long time since the first knives were crafted out of stone, we haven't given up on that ancient manufacturing technique.
But even in the face of these obstacles, even in these tough times, all across the country there are people like Rick and Dennis and Ruth and Will who haven't given up.
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Retrograde government-should-dominate-the-economy political forces haven't given up yet.
And that his current bosses, while making smart choices in building for the future, haven't given him much in the way of bridge players to tidy up the present.
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