Although the King stood by him, it was not enough because Addington did not have a strong enough hold on both Houses of Parliament. By May 1804, partisan criticism of Addington's war policies provided the pretext for a parliamentary putsch by the three major factions (Grenvillites, Foxites, and Pittites), who had decided that they should replace Addington's ministry. Addington's greatest failing was his inability to manage a parliamentary majority by cultivating the loyal support of MPs beyond his own circle and the friends of the King. That, combined with his mediocre speaking ability, left him vulnerable to Pitt's mastery of parliamentary management and his unparalleled oratory skills. Pitt's parliamentary assault against Addington in March 1804 led to the slimming of his parliamentary majority to the point that defeat in the House of Commons was imminent.