Since this hasn’t happened yet, it may be too early to declare that no one could have predicted (warning: Politico link):
Rep. Darrell Issa, the conservative firebrand whose specialty is lobbing corruption allegations at the Obama White House, is making plans to hire dozens of subpoena-wielding investigators if Republicans win the House this fall.[…..]
In other words, Issa wants to be to the Obama administration what Rep. Dan Burton (R-Ind.) was to the Clinton administration — a subpoena machine in search of White House scandals.[….]
With little policy work to get done, Republicans would focus on fighting and investigating Obama.
If Republicans gain control of the House, there is no question they will attempt to impeach Obama, for SestakGate, for iPodGate, for Henry Louis GatesGate. I don’t think there’s any question that much of the liberal media will support impeachment too. I am pretty confident that the public will not support it.