Opposition leader Kemal Kilicdaroglu has emerged as a serious election threat to President Recep Tayyip Erdogan
Opposition leader Kemal Kilicdaroglu has emerged as a serious election threat to President Recep Tayyip Erdogan AFP

President Recep Tayyip Erdogan's newly anointed rival in May elections pledged Tuesday to "end this madness" and turn Turkey into a peaceful nation in which its various communities get along.

Kemal Kilicdaroglu emerged victorious Monday from a bruising leadership battle between the heads of six parties united in the single goal of ending Erdogan's two-decade domination of his nation of 86 million people.

The bookish 74-year-old leader of the secular CHP party offers a study of contrasts to Erdogan -- a bombastic speaker and pious Muslim whose catchy charisma is offset by worries about his commitment to human rights.

Erdogan had spent months ridiculing opposition leaders for repeatedly trying and failing to settle their rivalries and forge a common front at the ballot box.

Kilicdaroglu put an end to that on Monday by walking out on stage before celebrating supporters and raising the hands of some of Turkey's most popular politicians that he hopes will put him over the top in the very close race.

These include the opposition mayors of Istanbul and Ankara -- two leaders that polls show stand an even better chance of defeating Erdogan.

Kilicdaroglu also secured the crucial backing of a staunchly nationalist party that can eat away at Erdogan's more traditional base of support.

Turkey's bond prices shot up on hopes that this new team is strong enough to beat Erdogan and then follow through on pledges to put the crisis-stricken country on a more predictable and market-friendly course.

"Today, we are very close to overthrowing the throne of the oppressors," Kilicdaroglu told his party faithful in his final parliamentary address.

"Together, we will end this madness," he added. "I am hopeful, my friends. I am very hopeful."

The upcoming election is widely seen as Turkey's most consequential since its birth as a post-Ottoman republic 100 years ago.

Erdogan has shaped Turkish society in his image while turning the NATO member into a regional power that has engaged in wars across the restive region and is battling a Kurdish insurgency across its southern flank.

He also prides himself on having never been defeated at the polls.

The upcoming vote is turning into his toughest election test yet.

Erdogan was battling a year-long economic meltdown when a massive earthquake killed tens of thousands across Turkey's southeast last month.

A top United Nations official on Tuesday estimated the cost of the damage at more than $100 billion.

But the political price for Erdogan from his the government's slow response in the first days of the disaster is difficult to assess.

A poll by the Yoneylem social research centre showed Erdogan's public approval holding steady at around 41 percent over an 11-month stretch up to late January -- just days before the quake hit.

It also showed Kilicdaroglu's support rising from 29 to 46 percent.

Gonul Tol of the US-based Middle East Institute said the opposition's chances rose sharply after Istanbul mayor Ekrem Imamoglu and his Ankara counterpart Mansur Yavas agreed to join Kilicdaroglu's proposed new government.

"The formula reached over the weekend significantly improves the opposition's electoral prospects," she wrote in a report.

Kilicdaroglu is now expected to reach out to leaders of Turkey's pro-Kurdish HDP party to try and further expand his appeal.

The HDP had been excluded from the opposition alliance because of some of its members' more nationalist views.

But it joined a broad-tent coalition that won historic municipal elections across Turkey's main cities in 2019.

"Kilicdaroglu is a master of creating coalitions in a polarised country by building bridges between political parties from both the left and right sides of the political spectrum," IstanPol Institute director Seren Selvin Korkmaz said on Twitter.

The HDP has enjoyed the support of around 10 percent of Turkey's voters and is seen as a kingmaker in the race.

The party signalled late Monday that it was halting plans to run its own candidate but would listen to new overtures from the opposition bloc.

"If the HDP (joins Kilicdaroglu), the opposition might win the elections in the first round, without having to go to a second-round run-off," Tol wote.

Turkey's bickering opposition leaders have settled their rivalries and joined forces in the May vote
Turkey's bickering opposition leaders have settled their rivalries and joined forces in the May vote AFP
President Recep Tayyip Erdogan is facing economic upheaval and anger over his response to a deadly quake
President Recep Tayyip Erdogan is facing economic upheaval and anger over his response to a deadly quake AFP
Turkey's pro-Kurdish party is thinking of joining the opposition alliance instead of running their own candidate
Turkey's pro-Kurdish party is thinking of joining the opposition alliance instead of running their own candidate AFP