It's hard to tell how much influence libertarian ideas have had on the populace. Media might not reflect the change in attitudes regarding politicians, interventionist government and the concept of State, because media is lagging behind, still enmeshed in State power. One aspect of the libertarian political philosophy which I and others have emphasized for some time now is that politicians are not special, and just because someone makes enough promises, has a winning personality and gets elected to office doesn't mean that there's anything particularly special about the person which makes them an expert on economics, foreign affairs, finances, manufacturing, energy, etc.
Libertarians simply don't find any great value in government officials, per se -- they are ordinary people like the rest of us, and many are not very competent. I'm sure there are very intelligent people working all throughout government, but government itself doesn't acquire any great powers that make it okay for officials to violate rights when there are laws preventing people outside of government from violating the rights of others. There's no special, mystical power that government possesses which allows it to establish a War on Drugs then interfere with a person's private choices as long as the person's choices don't violate the rights of others. Government possesses no special power which allows it to confiscate private property as it sees fit, just like I have no special power to confiscate my neighbor's property.
The American people have given government extra-Constitutional powers beyond what it should possess, and government has taken on powers that it shouldn't have that no one has taken back. There's evidence from polls regarding what the public thinks of government and Congress that Americans have had enough and are ready to push back. As the Information Age matures and people are receiving information 24/7, those who were awed by political figures before are beginning to understand that the officials are not special. In fact, many who make it through the political process possess character flaws which make them unfit for public service. We tend to forget that the government is our government, and the officials are public servants, and that we pay their salaries to do a job for us. We give government permission to use force, but only under special conditions -- we haven't changed the Constitution to allow government to coerce us in any way it chooses. If libertarianism has played a part in this awakening and change of attitude toward the role of government in our lives, then I'm happy, but there's a long way to go.