He doesn’t seem to care about the constitution if it gets in his way.
Check it out:

The GOP finds itself in a difficult situation when it comes to long-term spending problems, House Speaker John Boehner said Thursday: “instead of looking to work together the president reminded people this week that he has ‘a pen and a phone.’ I would remind the president he also has a constitution and an oath of office that he took where he swore to faithfully execute the laws of our country.”