I have another idea why Trump "cancelled" the meeting. For security reasons. Expanding on this:  >>/54760/
If they announce they are gonna have a meeting in two weeks, that means two weeks preparation time for an assassination.
Now I'm pretty sure if anyone tried that, those people and their families and their cats even would get in real trouble. Nevertheless I can list two countries from the top of my head with at least a few people sour and angry enough not to care or have nothing to lose: Ukraine and Iran.
Still Hungary seems to be the place to hold such summit. It can be surveiled quite well, small country, everyone hooked on the Google/Apple/Facebook spy network. Foreigners can't learn the language and Hungarians don't speak foreign languages, it's easy to filter out the chatter that doesn't belong. There are no local groups, organizations who'd have such beef with Trump or Putin they'd attempt anything. And they are all infiltrated anyway.
So slimming down the timeframe for the preparations of an attack could be another step to make it impossible to put it in action.
What I think they'll announce the event suddenly, we're gonna read some headlines at one point that says:
> Tomorrow President Trump and President Putin will meet on Yournut
Or
> Yesterday PT and PP had a meeting in Panties

Meanwhile our Fidesz/govt. media is full on telling us the meeting will happen.
I'd also expect Tucker Carlson appearing here, he already visited Hungary and made an interview with Putin, he might do another one here.