Is this the year the NRA's back is broken?
The gun lobby, represented by the NRA, has spent an all time record of more than $20 million on ads to support Trump and attack Clinton. Fivethirtyeight.com gives Clinton an 82% chance of winning.
Of the ten Senate races that might tilt the Senate to Dem control the NRA has contributed $42,600 to 6 of them. Of those six only two Republicans are ahead in the polls. The remaining four races are so far gone that the NRA has pulled all spending.
I can't find enough data to predict the House but I can assure you that gun control will NOT be a factor in GOP wins.
This could be the year that the myth of gun rights as a third rail is exploded once and for all.
RIP NRA.
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I'll gladly have suffered through the Trumplican's BS for a year and a half if we get a Clinton presidency and enough down ballot seats to say goodbye to the NRA. 
