An Egyptian politician emerged just ahead of a deadline Monday as the sole challenger to President Abdel Fattah el-Sissi in an election in March the incumbent is set to win after other candidates withdrew citing repression.

Mousa Mostafa Mousa leads the Ghad party that has endorsed Sissi for a second term and even organized events to help nominate the former military commander as recently as last week.

Sissi was elected in 2014, a year after leading the army to oust President Mohamed Morsi, an Islamist. It is the third election since protests in 2011 unseated long-time ruler Hosni Mubarak.

Several leading opposition figures called for an election boycott Sunday, blaming repression that has cleared the field of challengers and left Sissi's top opponent in jail.

Ethiopia Africa Summit Egypt's President Abdel Fattah el-Sissi listens at the opening ceremony of the African Union summit in Addis Ababa, Ethiopia, Jan. 28, 2018. Egypt's President Abdel Fattah el-Sissi listens at the opening ceremony of the African Union summit in Addis Ababa, Ethiopia, Jan. 28, 2018.

At the time of Mousa's registration, his personal Facebook page included a cover photo with Sissi's face and "we support you as president of Egypt" written beneath it.

"We were supporting President Sissi before the decision to participate was taken," deputy head of the Ghad party Mahmoud Mousa told Reuters.

"We have a respectable program that we are offering to the Egyptian people and we are presenting ourselves just like any other candidate would," he said.

Mousa said he registered his candidacy at the electoral commission after having collected the required number of nomination pledges, submitting his official paperwork just minutes before the final deadline.

Would-be candidates were required to register by 2 p.m. (1200 GMT) Monday after clinching at least 20 nominations from parliament or 25,000 pledges from citizens across the country.

Mousa said he had netted 47,000 pledges and the backing of 27 lawmakers. The electoral commission said last week that Sissi had earned more than 1 million pledges. Over 500 of parliament's 595 lawmakers had already pledged support for Sissi.

Intimidation, arrests

The vote, slated for March 26-28, has come under heavy criticism from the United Nations, rights groups, and opposition figures who say its environment has been compromised by intimidation of opposition supporters, arrests, and a nomination process stacked in favor of the incumbent.

The electoral commission has said that it will ensure the vote is fair and transparent.

The last-minute bid comes days after Hisham Genena, a former anti-corruption watchdog chief who had been working to elect former military chief of staff Sami Anan, was attacked and badly wounded outside his home Saturday.

Anan's campaign was abruptly halted after he was arrested last week and accused of running for office without military permission.

Following the attack, a group of prominent figures including members of Anan's campaign, former Islamist presidential candidate Abdel Moneim Abol Foutoh, and Mohamed Anwar Sadat, who halted his own presidential bid out of concern for the safety of his campaigners, called for a boycott.

They said the state's policies were paving the way for extended limits to presidential terms and were "removing any opportunity for the peaceful transfer of power."