Franz Reinisch SAC (February 1, 1903 – August 21, 1942) was a member of the Schoenstatt Movement.
 He was a Catholic priest and refused to take the oath of allegiance to Hitler, for which he was executed.
William Clark (died 1603) was an English Roman Catholic priest and conspirator.
 He is remembered for his involvement in a plan to kidnap King James I of England, made together with another Catholic priest William Watson in the Bye Plot.
 He was executed at Winchester on 29 November 1603.
Adolf Hitler (] ; 20 April 1889 – 30 April 1945) was a German politician who was the leader of the Nazi Party ("Nationalsozialistische Deutsche Arbeiterpartei"; NSDAP), Chancellor of Germany from 1933 to 1945 and Führer ("Leader") of Nazi Germany from 1934 to 1945.
 As dictator, Hitler initiated World War II in Europe with the invasion of Poland in September 1939, and was central to the Holocaust.
William Warmington (c. 1556 – 1627 or later) was an English Roman Catholic priest, who took the part of James I of England in the allegiance oath controversy.
Dean (Christianity) William N. McNulty (1829-1922), was an American pioneer Roman Catholic priest, who arrived in New York from his native Ballyshannon, Ireland in 1850, during the time of the Great Irish Potato Famine and when, there, then, existed little in the way of Roman Catholic facilities about near by Passaic County, New Jersey.
 He is responsible for much of the foundation of the structural and institutional infrastructure of today's Roman Catholic Church in Paterson, New Jersey.
 To the end of his 93 years, a simple parish priest and caring steward of his flock, he refused the Pope's appointment of him as a Domestic prelate and, even, the then powerful Ku Klux Klan could not intimidate this beloved priest's honored 1922 burial.
 Father "Mac" as he was affectionately known in Paterson was so revered by its Irish and German Roman Catholic communities that his mere admonishing appearance in midst of Passaic County's 1880 Garret Rock May Day Riot or what national newspaper coverage of the time called "the most serious riot that has ever occurred in that section of the country" was sufficient to permit police to thereafter act to end the rioting.
 During his lifetime, the Pope, anyway, accorded this truly Reverend Father the extraordinary honor of naming him to the office of Papal chamberlain, which office is normally the reserve of European nobility.
 Father McNulty lies in front of Paterson's St. John's Church under an honoring bronze monument of his counseling a parish youth.
Georg Ratzinger PA (born 15 January 1924) is a German Catholic priest and musician, known for his work as the conductor of the Regensburger Domspatzen, the cathedral choir of Regensburg, Germany.
 He is the elder brother of Benedict XVI, Pope Emeritus.
 His great-uncle was German politician Georg Ratzinger.
William Matthews, S.J. (December 16, 1770 – April 30, 1854) was an American Roman Catholic priest of the Society of Jesus from Maryland.
 He was the first person born in British America to be ordained a Catholic priest and was the fifth Catholic priest in the United States.
 In 1809, Matthews became the seventh President of Georgetown College in Washington, D.C., which later became Georgetown University.
Blessed Pierre-René Rogue (11 June 1758 – 3 March 1796) was a French Roman Catholic priest and a professed member of the Congregation of the Mission – also known as the "Vincentians".
 Rogue exercised his pastoral duties in his hometown of Vannes and was known for his short stature and devotion to the faith.
 He was killed after he refused to take the oath of allegiance to the new French government.
 The townsfolk of Vannes nicknamed him "the wee priest" due to his short stature.
The Russian Orthodox Army (Russian: Русская православная армия , "Russkaya pravoslavnaya armiya") is a Russian Orthodox militant group in Ukraine that was founded in May of 2014, as part of the insurgency and following War in Donbass.
 It reportedly had 100 members at the time of its founding, including locals and Russian volunteers.
 As fighting between separatists and the Ukrainian government worsened in Donbass, their membership rose to 350, and later 4,000.
 Notable engagements of the ROA include the June 2014 skirmishes in Mariupol and Amvrosiivka Raion.
 The headquarters of the ROA is located in an occupied Security Service of Ukraine (SBU) building in Donetsk city.
 Members had no special training apart from the usual conscription service in the army and swore allegiance to Igor Girkin ("Strelkov"), insurgent and Minister of Defence of the self-declared Donetsk People's Republic.
 Along with other separatist groups in the region, the ROA has been noted of “kidnapp[ing], beat[ing], and threaten[ing] Protestants, Catholics, and members of the Ukrainian Orthodox Church… as well as participat[ing] in anti-Semitic acts.”
 In late November of 2014, the group gained attention after abducting prominent Ukrainian Greek Catholic priest, Sergeii Kulbaka, and Roman Catholic priest, Father Pawel Witek.
 According to the Defence Ministry of Ukraine, the ROA has also been in conflict with another pro-Russian militia, the Vostok Battalion, which accused the ROA of looting, and of avoiding combat.
Blessed Pierre-François Jamet (13 September 1762 - 12 January 1845) was a French Roman Catholic priest who refused to take the oath of allegiance during the French Revolution.
 He is also called the "Second Founder" due to restoring the dwindled order of the Sisters of the Bon Sauveur.
 In 1827 he was awarded the Legion of Honor for his service as a priest.

Question: What was the party lead by the German politician who executed Franz Reinisch, a catholic priest who refused to taka an oath of allegiance to him?
Answer: the Nazi Party