It doesn’t take a skilled code-breaker to figure out the liberal networks’ stance on President Donald Trump’s impeachment: There’s no doubt we need witnesses if the Senate is going to conduct a fair trial; impeachment is necessary to prove that nobody — not even the President — is above the law; and there’s no more pressing task for Congress if we’re to keep this President, and future Presidents, from acting like tyrants. But when the President being impeached was a Democrat, the spin was completely reversed.