Federal Funding and Speech Rights

I wonder how Planned Parenthood can officially support a political candidate while receiving tax dollars but somehow churches can't...

If the premise is that by receiving a tax exempt status you are somehow forfeiting your right to free speech then how can an organization who not only gets a tax exempt status but also federal funding get to endorse whomever they wish?

And how about teachers? Can someone tell me where they give up their freedom of speech? Granted, if you're a liberal teacher you can talk all day about whatever philosophy you want, but if a conservative teacher talks about a religious philosophy then it is somehow restricted?

And a student can't mention the name of Jesus in a public speech?

This is a great setup if you're liberal. You get to censor - at a local and federal level - speech with which you disagree. But like most liberal conveniences, there is always a dark side. Once it has been established that it is okay to censor speech that is inconvenient, how do you stop the Federal Government from expanding that power?

If free speech doesn't protect political speech, then it's useless and no citizen - liberal or conservative - has any political power.