The head of the President's Office, Krzysztof Szczerski, in Washington on Tuesday and Wednesday, will hold a series of talks related to preparations for the June 12 meeting of the Polish and US Presidents, Andrzej Duda and Donald Trump. Szczerski told PAP that during his two-day stay in Washington he will meet at the White House with the leaders of the National Security Council and with Kellyanne Conway, a special adviser to President Donald Trump.