I don't know how much of this is due to anti-amnesty, anti-Gang of 8 calls, but I hope it's a lot.
***
As still posted on John Cornyn's website on June 13, 2013:
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Due to high call volume, our phone systems have been experiencing technical difficulties. Thank you for your patience.
Jun 10 2013
http://www.cornyn.senate.gov/public/...8-0149e67b4bbd