[Grammar] Agreement: "Survey after survey" used as subject

[sgarry]

I have a tricky sentence for which I cannot determine the correct verb. Please help. The sentence is:
"Survey after survey in virtually every sector reveal/reveals a deep erosion in confidence in leadership...."

I'm thinking that it should be "reveal" because "survey after survey" would mean "more than one survey" or "all the surveys we've looked at", but I know that "after" is also a preposition and should be ignored when looking for agreement. Any thoughts?

Thanks in advance,
Shawn

 

[bhaisahab]

Is this homework?

 

[SoothingDave]

I know that "after" is also a preposition and should be ignored when looking for agreement

You said it.

 

[sgarry]

Is this homework?

Not homework, no. I'm an editor working on a book.

 

[MikeNewYork]

In my opinion, "survey after survey" is singular.