To hear the disgust that Liberals hold for politicians that use the Executive powers for snooping on their political enemies, just ask them about Nixon. Stand back, for the spittle-laced rage has not abated in 34 years.
Then, ask them what they think about the Obama administration's use of covertly-acquired information about Donald Trump.
Or, worse, a defense.
Now, was it TECHNICALLY wiretapping? It may not have fit that definition, but it WAS covert. More importantly, SOME of the people involved in the process did release personal information about an American citizen, against law and bureaucratic policy.
THAT'S why an investigation of the episode is warranted.