Question: What leftist political party was formed after the third President of Egypt succeeded Gamal Abdel Nasser in 1970?

Context paragraphs:
Gamal Abdel Nasser (disambiguation): Gamal Abdel Nasser (Egyptian pronunciation) or Jamal Abdel Nasser in classical Arabic pronunciation, former President of Egypt from 1956 to his death in 1970.

Abdullah Rimawi: Abdullah Rimawi (Arabic: عبد الله الريماوي‎ ‎ ; also spelled "Abdullah ar-Rimawi", born 1920) was the head of the Ba'ath Party in Jordan in the 1950s.  He served as Foreign Affairs Minister in Suleiman Nabulsi's government in 1957.  A staunch pan-Arabist, Rimawi became one of the most vocal opponents of the Hashemite ruling family in Jordan and favored union with Syria.  He fled Jordan in 1957 as the result of a crisis between the leftist government he was a part of and the royal family.  He based himself in the United Arab Republic (UAR; result of union between Egypt and Syria in 1958) where he drew closer to UAR President Gamal Abdel Nasser provoking his expulsion from the Ba'ath Party—which was at odds with Nasser—in 1959.  Soon after he founded a splinter party called the Arab Socialist Revolutionary Ba'ath Party.  During his exile, he allegedly made a number of attempts to attack or undermine the Jordanian monarchy.

Ashraf Marwan: Ashraf Marwan (Arabic: أشرف مروان) (2 February 1944 – 27 June 2007) was an Egyptian billionaire and the husband of Mona Gamal Abdel Nasser, daughter of former Egyptian president Gamal Abdel Nasser.  Since 1969 Marwan served in the Presidential Office, first under Nasser and, then as a close aide to his successor, President Anwar Sadat.  In 2002 it became known that, during the period leading up to the October 1973 Yom Kippur War, Marwan spied for Israel (under the Mossad code-name "The Angel"), disclosing some of Egypt’s best-kept secrets.  His warning on 5 October 1973 that "war will start tomorrow", triggered an emergency Israeli military mobilization and prevented a complete surprise on 6 October and the complete occupation of the Golan Heights by the Syrian Army a day later.  Marwan died under mysterious circumstances in June 2007, falling from the balcony of his expensive London house.

Secularism in Egypt: Secularism in Egypt has had a very important role to play in both the history of Egypt and that of the Middle East.  Egypt’s first experience of Secularism started with the British Occupation (1882–1952), the atmosphere which allowed the protection of debate.  In this environment pro-secularist intellectuals like Ya'qub Sarruf, Faris Nimr, Nicola Haddad whom sought political asylum from Ottoman Rule were able to publish their work.  This debate had then became a burning issue with the work of Egyptian Shaykh Ali Abdel Raziq (1888–1966), “"The most momentous document in the crucial intellectual and religious debate of modern Islamic history"” By 1919 Egypt had its first political secular entity called the "Hizb 'Almani" (Secular Party) this name was later changed to the Wafd Party.  It combined secular policies with a nationalist agenda and had the majority support in the following years against both the rule of the king and the British influence.  The Wafd party supported the allies during World War II and then proceeded to win the 1952 parliamentary elections, following these elections the prime minister was overthrown by the King leading to riots.  These riots precipitated a military coup after which all political parties were banned including the Wafd Party and the Muslim Brotherhood.  The government of Gamal Abdel Nasser was secularist-nationalist in nature which at the time gathers a great deal of support both in Egypt and other Arab states .

Anwar Sadat: Muhammad Anwar el-Sadat (Arabic: محمد أنور السادات‎ ‎ "Muḥammad Anwar as-Sādāt ", ]; 25 December 1918 – 6 October 1981) was the third President of Egypt, serving from 15 October 1970 until his assassination by fundamentalist army officers on 6 October 1981.  Sadat was a senior member of the Free Officers who overthrew King Farouk in the Egyptian Revolution of 1952, and a close confidant of President Gamal Abdel Nasser, under whom he served as Vice President twice and whom he succeeded as President in 1970.

Khaled Mohieddin: Khaled Mohieddine (born August 17, 1922) (Arabic: خالد محيى الدين‎ ‎ , ] ) was an Egyptian politician and a major in the Egyptian Army.  He participated in the Egyptian Revolution of 1952, as a member of the Free Officers Movement, which overthrew the monarchy under King Farouk.  He held important political and media roles throughout Gamal Abdel Nasser's presidency, although the two had a number of fall-outs as well.  His political influence diminished during the early part of Anwar Sadat's presidency until he founded the leftist political party National Progressive Union Party (Tagammu) in 1976.  Under Mohieddine's leadership, Tagammu became a significant opposition force during Hosni Mubarak's rule.

History of Egypt under Gamal Abdel Nasser: The history of Egypt under Gamal Abdel Nasser covers the period of Egyptian history from the Egyptian Revolution of 1952, of which Gamal Abdel Nasser was one of the two principal leaders, spanning Nasser's presidency of Egypt from 1956, to his death in 1970.  Nasser's tenure as Egypt's leader heralded a new period of modernization, and socialist reform in Egypt, and a staunch advocacy of pan-Arab nationalism (including a short-lived union with Syria), and Developing World solidarity.  His prestige in Egypt and throughout the Arab World soared in the wake of his nationalisation of the Suez Canal in 1956, and Egypt's political victory in the subsequent Tripartite Aggression, but was damaged badly by Israel's successful invasion and occupation of Egyptian and Arab territory in the Six-Day War of 1967.

Gamal Abdel Nasser University of Conakry: Gamal Abdel Nasser University of Conakry (in French "L'Université Gamal Abdel Nasser de Conakry", UGANC), is the largest university in Guinea and located in the suburbs of Conakry, the Guinean capital.  The name is generally shortened to the University of Conakry.

Abdel Latif Boghdadi (politician): Abdel Latif Boghdadi or Abd el-Latif el-Baghdadi (20 September 1917 – 9 September 1999) (Arabic: عبد اللطيف البغدادي‎ ‎ ) was an Egyptian politician, senior air force officer, and judge.  An original member of the Free Officers Movement which overthrew the monarchy in Egypt in the 1952 Revolution, Boghdadi later served as Gamal Abdel Nasser's vice president.  The French author Jean Lacouture called Boghdadi "a robust manager" who only lacked "stature comparable to Nasser's."  The two leaders had a fallout over Nasser's increasingly socialist and pro-USSR policies and Boghdadi subsequently withdrew from political life in 1964, although he mended ties with Nasser before the latter's death in 1970.

Khalid Abdel Nasser: Khalid Abdel Nasser (Arabic: خالد عبد الناصر‎ ‎ , also spelled Khalid 'Abd al-Nasir; December 13, 1949 – September 15, 2011) was the eldest son of Egypt's second President Gamal Abdel Nasser.

Supporting paragraphs: Khaled Mohieddin Anwar Sadat
Answer: National Progressive Union Party