First of all, you already have to dilute the force if you are the defence, because you do not just defend one side of your country, you need to defend all side. So In effect, that does nothing, because US would already have to deploy Fighter Squadron regardless whether or not Russia deploy their bomber in Venezuela, also, US have more (A LOT MORE) fighter than Russian have Tu-160 bomber, which mean US can take the dilution, Russia cannot
Second of all, the route taken from Venezuela would have to pass thru Columbia, Mexico before entering US air space via Texas, and Dominican Republic and Puerto Rico (US territories) if they want to go to Florida, which would increase chances of these bomber being seen (especially from Puerto Rico side of the region, as they are US territories and have US based system on it) on the other hand, Russian bomber flew from Kamchatka would have flew DIRECTLY to US, which mean less chances they are spotted, because between Kamchatka and Alaska or Washington, there are nothing but water.
How? KH-101 have a reported range of 4500-5000km, Texas and Venezuela, if we draw a straight line, it would be 4500 mile (nearly 7000km away), and if we go from the base that supposed to base the Russian Bomber, it's 5200 miles which is over 8000km.
Also, you did not answer my question. Because whatever you can do in Venezuela, you ALREADY have that capability to do them in Russia, unless you claim Russian bomber flew from Kamchatka are some how restricted to not carry Kh-101. Which mean whatever you said the Russian can do from Venezuela ALRREAD CAN BE DONE via Kamchatka, because it is CLOSER to the US Mainland. They can literally lift off from Kamchatka and shoot their missile and reach Alaska or go a bit further and shoot their missile.
So my question still stand, this is a duplicate move and Russia already have a better place to launch bomber strike from mainland, thus making this "Move" redundant.
Then let alone missile can be intercepted and usually did not do much damage anyway to begin with.