If the Constitution is to have any relevance, and if America is to remain a free society, then there is really no alternative: there must be a bill of impeachment drawn up and submitted in the House, and there must at least be a hearing on that bill in the House Judiciary Committee.
Thus begins the argument for impeachment by David Lindorff in Counterpunch for the impeachment of Barack Obama unless we just want the Constitution to be even more of a "dead letter" than Justice Scalia imagined. Lindorff concludes:
If you think that is hyperbole, just imagine back to the year 2000, and try to recall if you ever could have imagined the US as a nation where the president could just order the termination of an American citizen or a 16-year-old kid on his own whim, or maintain a lengthy “kill list” in the Oval Office.
Of course, we can also add Fast & Furious, which inflamed a civil war on the border of Mexico, a sovereign nation, for the purpose of discrediting the Second Amendment, and the Libyan "régime change" in 2011 where he aided the Libyan rebels in complete violation of the War Power clause of the Constitution and the War Power Act intended to reign in Presidents who had walked all over it previously.