House
Speaker Clown John Boehner
isn't saying exactly why it is that he's planning on suing the president, but in general he says that the issue is that President Obama has usurped congressional power through executive action. As a result, the president is no longer "faithfully executing the laws of our country."
So, at the 30,000-foot level, it's a principled stand against a president engaging in an unprecedented expansion of executive authority. Except one little thing, notes Christopher Ingraham:
Back in February I analyzed the numbers on executive order frequency and found that Obama has actually been less likely to resort to the pen and phone than any president since Grover Cleveland.
And John Hudak of Brookings
adds:
...claims that President Obama is issuing more than his predecessors is just flat wrong—and continues to be a talking point completely at odds with real data.
Fair point, but I doubt Boehner is listening. He's too busy figuring out precisely why he thinks Obama is a renegade dictator-tyrant.