Actually, it began under Roosevelt. The only President not given this authority since then was Nixon and had he not been forced to resign, no doubt he would have been given TPA, also.
There is even a clause in the 2015 version that specifically deals with no changes whatsoever to US. laws and sovereignty. Those were the two areas of concern. Also, now that the House has voted, language on immigration has also been added.
Right, so Clinton had it too.
This is why I am so confused as to the sudden outrage.
Have fun buying meat at the super market. Could be from Mexico.