I like the idea of telling the candidates how we feel about this issue. The difference between Obama and your example is that 4 years ago Obama's platform was not in your face rhetoric about selling off our public domain . . . These guys are running on this platform . . . choose a better example please . . .
We can do a lot of worrying over platforms, but what is really implemented and what is ran on as a platform are two different things.
For example, Obama ran on platforms such as:
Closing Gitmo
Anti-war
Securing nuclear weapons from rogue states
Constitutional protections for civil liberties
Transparency in government
He also criticized Bush for extending the debt ceiling when he was a senator
And yet, today:
Gitmo is still open
We're still fighting in Afghanistan and we entered into conflict in Libya
Iran is going nuclear
The Patriot Act and similar infringements on civil liberties have not only been upheld, but they have been expanded
The Justice Dept. has not been forthcoming on issues such as sending assault rifles to Mexico
Obama is continually pushing for extending the debt ceiling.
Point being, candidates usually don't live up to their claims (thankfully in most cases). Also, the government's structure does not allow for very much unilateral action.
But both parties love to prey on people's fears about what may happen if candidate XYZ is elected. IMO, choices in politics are often based on which irrational fear scares a particular voter the most.