To study the speech behaviour of a politician by the method of a pragmalinguistic experiment, the personality of the Minister of Foreign Affairs of the Russian Federation Sergey Lavrov was chosen, who is not coincidentally called “the Minister of sharp phrases” in the media. The aim of the work is to establish how his speech behaviour and the features of the speech he produces depend on the choice of the speech means (grammatical and textual) selected by the politician, which may indicate some qualitative features of his personality as an author. Attaining the research aim involves identifying a fragment of the politician’s speech portrait taking into account the quantitative data of the plans of the strategy “Participation/non-participation of communicants in a speech event”. All texts were divided into small syntactic groups, the total number of analysed units was 113. The scientific novelty lies in the fact that the use of a set of methods helped to identify for the first time a fragment of the politician’s speech portrait based on the analysis of his influencing media statements with a humorous effect. The described experiment concerns an emotion-oriented strategy of covert influence, which includes three plans: personal, social and subject, each of them acts as a diagnostic one to determine the personal qualities of the sender of the text. As a result, the analysis showed that S. V. Lavrov’s speech behaviour is dominated by the social plan – 43.4%, indicating a great influence of the speech of the politician who not only possesses purposeful individualisation, but also social, political intentions, has an ideological attitude.