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In 2006, he protested against the controversial Election Commissioner (CEC) MA Aziz decisions on holding polls.
In 2006, as the BNP's term was ending Ershad joined the party's 4-Party Alliance after meetings with Tarique Rahman and Lutfozzaman Babar, which were followed by meeting with Khaleda Zia at her Mainul Road House. However, in late October 2006, he said he was not in the 4-Party Alliance, reversing his position the following day. Then he went into hiding for 3 days and joined the Awami League's Grand Alliance at Paltan Maidan with Sheikh Hasina.
But Hasina later breached the agreement between the two which promised to make Ershad the President for at least six months. Moeen also committed to make him president before 11 January 2007, but did not. Earlier, Ershad had been offered the position of head of the Government in 1991 by Sheikh Hasina while he was in jail, as well as by Khaleda Zia in 1996 just before the Awami League formed the government after a period of 21 years. Then, Ershad had joined the 4-Party alliance after the 1996 elections, but left later.
On 8 April 2008, Ershad took charge of his Jatiya Party once again. On 19 November 2008, Jatiya Party and Awami League agreed to contest the elections jointly under the Caretaker Government to be held on 29 December 2008. Out of the 300 constituencies in the parliament, Ershad's Jatiya Party contested from 49 (later 42 as Awami League did not pull back its candidates from few seats as agreed earlier) seats and Awami League and members of a leftist Fourteen Party Coalition from the rest 250 seats. At the last minute, Ershad supported the Awami League in the December 2008 election. Thus, the Grand Alliance emerged in Bangladesh.
Ershad contested the Bangladesh Parliamentary Election 2008 from three constituencies. According to Bangladesh electoral laws, a person is allowed to contest from three places, but can retain only one seat and two are to have by-elections after formation of government. These constituencies included Rangpur (Rangpur-3 and Kurigram-2), and Dhaka-17, the capital's diplomatic zone, where he resides. He won all three seats in the election.
The 2014 Election was a controversial election for Jatiya Party where Ershad's spokesperson Bobby Hajjaj had first publicly declared that Jatiya Party would not participate in the election. After the 2014 election, Ershad became the special envoy of Prime Minister Sheikh Hasina in the Awami League-led government. Jatiya Party became the opposition party and Rowshan Ershad, Ershad's wife, became the leader of the opposition. Despite being in the opposition party some leaders of Jatiya Party were also in the government cabinet. In January 2016, Ershad's brother, GM Quader, was made the vice-chairman of the party. In April 2016, Ershad appointed Rowshan as the vice-chairman of the party. In March 2017, Ershad indicated he might form a new political alliance with 14 other parties. For the next general election, the Jatiya Party under Ershad formed a 58 party grand alliance of its own. But of the 58 parties, only the Jatiya Party and Bangladesh Islami Front had registration with the election commission as of 2017.