Not impeachment of President Obama. Despite the crazy warnings of some on the left, that won’t happen (barring some dramatic malfeasance that we have no reason to expect).
No, the follies are from the other side. Some Democrats are looking into impeaching Chief Justice Roberts over the Citizens United decision. They claim that Roberts committed perjury by claiming not to be a judicial activist.
POSTSCRIPT: Setting aside the preposterous effort to elevate a difference of opinion to an impeachable offense, the current Supreme Court is actually the most restrained in decades.