Maybe because it was a holiday weekend, I've received only one poll asking if I think President Obama should be impeached, and it didn't specify if wearing a tan suit is grounds for impeachment (as the blue dress had been for President Clinton).
Those upset about the suit deemed it inappropriate for a speech about America's foreign policy, tweeting that the suit didn't have enough gravitas. During most of his presidential terms, Obama has worn serious suits, compatible with the problems he inherited and the messages he's had to deliver. Perhaps the president could mollify his critics by coordinating his clothing with his topic, i.e., when discussing Obamacare, wearing hospital scrubs, and taking care to match his ties with the current color of the terrorist threat.
The jeans he wore when throwing the first pitch at the 2009 All-Star game, though not rising to the level of an impeachable fashion offense, were called "mom jeans." When the inevitable happens, let's hope "Not Your President's Jeans" will be made here in America.