london sebastian gorka former adviser u.s. president donald trump quit top white house political strategist steve bannon oust join nationalist pro-trump campaign organization group announce tuesday maga coalition dedicate help advance trump america first principles say hire gorka chief strategist maga head adam gingrich pennsylvania political operative back trump presidential campaign maga statement announce gorka appointment say mission identify obstructionists washington dc advocate america first principles catapult donald trump white house quote gorka 46 condemn dc swamp-dwellers think know good people represent gorka outspoken advocate tough u.s. anti-terrorism policies past assert u.s. efforts counter islamic state jihadist propaganda pin-pricks often counter-productive prior time bannon white house team gorka national security editor breitbart.com far-right website bannon head join white house rejoin leave white house last month gorka son hungarian refugees bear britain also previously teach class u.s. marine corps university white house gorka regularly appear cable news show promote trump policies intelligence professionals diplomats view ideologue lack real-world experience late august conservative federalist website publish letter gorka say resign trump administration white house official say statement sebastian gorka resign confirm long work white house former white house aide gorka join pro-trump campaign group