With the left continually displaying tendencies towards violence in their tactics such as the Black Lives Matter movement, anybody who wears a Donald Trump T-shirt can expect to get slugged in the face and bloodied for display of this support at the hands of the criminal left. Nobody in the Obama Justice Department is interested in the least in prosecuting any of this violence, if it furthers the agenda of the left.
If you have the nerve to indicate to the Internal Revenue Service that you support conservative values, you invite an audit. If you enter a polling place in Philadelphia with any indication that you don't support the left, you are intimidated by thugs with billy clubs at the door, and nobody in the Justice Department is in any way going to stop this intimidation. They actually support it.
Accordingly, to express support of Donald Trump is to invite violence upon the expressee. Who in their right mind would tell pollsters that they support Donald Trump, and then the next night find a brick thrown through their front window with a threatening note tied to it? I myself will in no way put up a Trump campaign sign in my yard or a Trump bumper sticker on my truck, not a chance. And invite some nut job lefty to place a bomb under my vehicle?
I am solidly behind Donald Trump. And I am going to vote for Donald Trump. But I am in no way going to tell a pollster about my preferences. I suggest that I am not alone in this perception. I would wager that something akin to 'The Bradley (or Wilder) Effect is in play here. This 'effect' was seen in the 1982 polls in Los Angeles, when African American Democrat Tom Bradley was way ahead in the polls leading up to California gubernatorial election day, and then lost to a white George Duekmejian despite lopsided polls to the contrary.
The mainstream media are carrying the water for Hillary Clinton in a big way this election cycle. They will support any and all means to discredit Donald Trump, to include violence. I am of the opinion that Donald Trump has way more support than polls suggest.
We'll see how this works on on election day, won't we?