Chuckle!
Of course national polls matter.
That is why there has never been a case where any candidate won by 7% (like Ted Cruz is beating Hilary Clinton in the latest Fox polls), and lost the electoral vote. Every single candidate that won the popular vote by 7 points or more, won the electoral votes too.
And if you don’t believe me, ask Mitt Romney, who foolishly believed the same crap as you are posting here.
Now why don't you show me ANY TIME AT ALL that Romney ever led Obama by 7% in the popular vote general election matchups?
Romney got clobbered in the popular vote.
I know my people. And I’ll be here on election day.
Will you?