Original: After a series of secret meetings attended by Meissner, Schleicher, and Heinrich Brüning, the parliamentary leader of the Catholic Center Party (Zentrum), Schleicher and Meissner were able to persuade Brüning to go along with the scheme for "presidential government".
Simplified: During the winter of 1929   1930, Schleicher had a series of secret meetings with Heinrich Brüning, the leader of the Catholic Center Party (Zentrum).