US allies do spy on American corporations and the US Government. Israel for example has been caught over and over again spying on the US, and is a big concern for US intelligence agencies.

http://bigstory.ap.org/article/us-sees-israel-tight-mideast-...

Countries we're neutral with (not allies per se, not at war with), such as China, routinely spy on the US Government and its corporations; ditto Russia (and that goes back a long ways). And of course China is America's largest trading partner, so we're quite friendly there.

Or for example, the UK spying on the Germans:

http://rt.com/news/uk-germany-wiretapping-criticism-201/

I would argue that all the major countries are attempting to spy on all the other major countries.

Perhaps none so successfully or belligerently as the US of course.

I can only speak for myself, but I'd be pissed that our counter-intel guys didn't detect the bug and that our NSA COMSEC guys didn't employ effective countermeasures.

We've assumed people are spying on us as a matter of course, if we've paid attention to world history. The Soviets and Israel especially have had some especially ingenious means to spy on U.S. diplomatic communications.

Like this?

http://www.nytimes.com/1993/04/30/world/us-expanding-its-eff...

If the U.S. invited some EU representatives to the Whitehouse, and the representatives was caught planting bugs, then the outcry would be likely very high. Words like terrorist plots would likely be mentioned.

And the representatives would end up in jail/death row.

... do you think the EU isn't spying on the US?

It would be absurdly naive to think they weren't.

The EU has no NSA.

But member states do, although not funded to nearly the same level. E.g. GCHQ in the UK. It'd be surprising if someone revealed to be as trigger happy and willing to spy on allies as GCHQ does not also spy on US interests.

GCHQ has nothing to do with the EU. It is a British institution and works closely together with the NSA.