We have to marvel at what Boehner did. No matter his personal feelings about Obama, he could only undermine his own president in foreign policy if he simply had no respect for the office of the president. Compare this with the GOP position during the Bush administration, when any criticism or effort to oppose Bush was tantamount to treason.
Whether the Court's recent turns will threaten the public's perception of the Court, and the court system as a whole, remains to be seen. But the jury is out, and the data seems to be coming in: The Court appears in the midst of a significant partisan turn, one that could threaten its long-term legitimacy.