I suspect that, to many people, “impeachment” implies removal from office which is which is what the late President Nixon was faced with.
But impeachment from office is a two stage process, the decision to remove somebody impeached by House from office solely up to the Senate.
In fact, all that Bill Clinton did when he was impeached by the House was to silently laugh at the House because he knew that the Senate would not remove him from office.
And just as with Clinton, Harry Reid is likewise not going to permit the Senate to remove Obama from office if impeached by the House. So the only reason that I think Obama is “concerned” about impeachment is use the situation as a stunt to make the RINO-controlled House look bad in the eyes of low-information voters who probably don’t know what is going on.
Obama wants to be impeached but before the 2014 elections. He is trying his damndest to make this happen. He would never be convicted in Harry Reid’s Senate and at the same time take the spotlight off his many dismal failures and acts of lawlessness. If we impeach him it must be after the elections in November.