With your good name. In the end, it is not important what the politician had or did not have on the disk, but who the public will believe more, the secret services, who claim that there was something there, or the politician, who claims that he is being set up and groundlessly persecuted for the purpose of political pressure.
And as long as public opinion about the special services is what it is, politicians can safely stash CP on their disks without fear that they will be charged with anything even if they are found.