Now let's assume that this is a false flag perpetrated by a leftist, though not necessarily a Democrat:
Pros: By framing the event as an attack by "far right" and "Trump supporters" (often synonymous in MSM), He manages to push forward the prevailing MSM narrative of violent fascists vs. innocent put-upon liberals. Indeed the head of CNN already went there. Schumer et-al already rejected Trump's condemnation of the devices. Every left-wing media outlet has discussed how Trump's "attacks on media" are the cause of the "environment" and "climate". This will work to motivate left-leaning persons to [further] support Democratic candidates. Cons: The only real con to this is like the other prospect. Being found out prior to the election would be a devastating blow to Democrats. Not because Democrats are behind the apparent hoax. But because it would be clear to the public that isn't necessarily supportive of Trump that the far left is increasingly out of control and supported by Democrats. It would be the Kavanagh Bump on steroids. Also it is likely that if the person is discovered after the elections, Trump would be handed a hammer with which to [continue] to hammer the MSM and various politicians. That said, I believe that if the person does NOT turn out to be a Trump supporter or Republican, that the event will quickly be memory holed with an adjusted narrative which removes the event but keeps up the chatter about "climate". As what happened with Congressman Scalise and Rand Paul Again, this is speculation based on the current limited information. [update 4:13PM] The NYT is reporting as follows:The packages have shared the same traits: a manila envelope containing a 1-inch-by-6-inch length of PVC pipe filled with powder believed to be a pyrotechnic substance and packed with shrapnel. The pipes were also equipped with a small battery, a digital clock as a timer and an initiator, which causes the bomb to explode, a law enforcement official said."Powder believed to be a pyrotechnic substance". I think by this time we would know whether it was a pyrotechnic substance. The device found this morning was transported to a secure location. It doesn't take long to determine if the powder was explosive or not.
But Gov. Andrew M. Cuomo of New York said on Thursday that the devices were functional explosives. “They are bombs capable of detonation. That has been established,” Mr. Cuomo told CNN. “Was that purposeful or incidental? Was it a poorly constructed bomb?”Sorry but Governor Cuomo has shown himself to be a liar. His commentary regarding Anti-fa's recent behavior shows he is given to political machinations. The governor is not an explosives expert and neither am I. I will take the word of actual experts over Cuomo any day of the week.