Why CIA did not set a plot

{@dubum] 😆i just worked out an anagram of your user name is dumb u and your suggestion rather matches it no offence meant by the way ,what do you think the russians reaction would be if they uncovered a plan to attempt to assassinate putin by an outside world power .as if east -west relations are not bad enough at this present time . besides i think it would be a futile exercise in a sense as i am sure if any assassination on putin worked one of his cronies would take over and this would just carry on in russia as they always have under putins regime