ANKARA — As Sinan Ogan tells it, he has abruptly grow to be probably the most sought-after man in Turkey.

The hard-right nationalist and third-place finisher in presidential elections final weekend, Mr. Ogan informed The New York Times that he has been fielding calls all week, from cupboard members to opposition leaders and even the workplace of President Recep Tayyip Erdogan. They all need the identical factor — assist wooing his important swing voters somehow within the May 28 runoff between the 2 front-runners.

“Very busy,” Mr. Ogan stated at his workplace within the capital, Ankara, on Tuesday afternoon. “I spent my last three or four days negotiating issues with such high-level people.”

Mr. Ogan and different hard-right nationalists made a powerful exhibiting in Sunday’s presidential and parliamentary elections, prioritizing nationwide safety and the protection of what they take into account Turkish identification. In specific, they advocate robust stances on the greater than 3.3 million Syrian refugees.

Since the vote, Mr. Ogan’s has been referred to as every little thing from a spoiler, who blocked the highest presidential contenders from an outright victory, to a kingmaker whose supporters might play a job in deciding the runoff. That has given him a sudden clout, evidenced by the flood of calls he says he has acquired this week.

The sturdy efficiency of nationalists in these elections will seemingly pull Turkish authorities coverage additional to the suitable within the years to come back, significantly close to the nation’s Kurdish minority and Syrian refugees.

In the vote on May 14, Mr. Erdogan received 49.5 p.c whereas his essential challenger, the opposition chief Kemal Kilicdaroglu, took about 44.8 p.c. Mr. Ogan received a shocking 5.2 p.c.

With his snug lead within the first spherical, Mr. Erdogan now seems poised to win the runoff, particularly if a very good variety of Mr. Ogan’s voters throw their assist to him. Analysts stated they anticipated extra of these voters to decide on Mr. Erdogan than his challenger.

Mr. Ogan, 55, is a former parliament member and professional on the Caucasus who speaks Russian and earned a doctorate in politics and worldwide relations from a Moscow college.

He stated he expects to announce his endorsement round Thursday, and assumes that 70 p.c of his supporters would observe his advice. But political analysts are much less certain, noting that Mr. Ogan lacks a robust social gathering equipment to corral voters. And lots of his supporters might have chosen him to protest the highest contenders, and will skip the runoff.

Mr. Ogan stated he has calls for in alternate for throwing his assist to a candidate, all of them aimed toward selling nationalist causes. For one, he desires a scheduled plan to deport the refugees from many international locations, together with Syria and Afghanistan. And in alternate for endorsing a candidate, he additionally desires a really senior publish within the new administration to see his calls for by means of.

“Why would I be a minister when I can be vice president?” he stated.

He declined to say whether or not he was leaning towards a selected candidate.

He stated he admired Mr. Erdogan’s work ethic, but additionally criticized him for not consulting sufficient with others earlier than making selections. Mr. Kilicdarolu, he stated, was not as arduous working however broadly solicited others’ opinions.

The opposition camp overlaps with the far proper on some points, together with the need to ship the Syrian refugees dwelling, and will step up efforts sway nationalist voters earlier than the runoff.

Idris Sahin, an official with DEVA, one of many opposition events backing Mr. Kilicdaroglu, stated his social gathering had finished a “sociological study” of Mr. Ogan’s voters and would quickly launch a marketing campaign concentrating on them.

On Wednesday, Mr. Kilicdaroglu launched a marketing campaign video attacking Mr. Erdogan and his social gathering with harsh nationalist rhetoric.

“The border is honor,” Mr. Kilicdaroglu stated, referring to the president’s permitting tens of millions of refugees from Syria and elsewhere to settle in Turkey. He referred to as the refugees an “unruly flood of people flowing into our veins every day” and warned that their quantity would improve and “threaten our survival!”

Mr. Ogan wouldn’t reply immediately when requested whether or not he had spoken with Mr. Erdogan a couple of attainable endorsement. Officials from Mr. Erdogan’s social gathering and the opposition haven’t spoken publicly about any negotiations with Mr. Ogan.

“I talk to everyone,” he stated.

Among Mr. Ogan’s different calls for, he stated he doesn’t need any political social gathering that he considers linked to terrorism — a time period the federal government typically makes use of to check with Kurdish militants — to have any function within the authorities.

He talked about two events particularly: the Free Cause Party, a hard-line Islamist social gathering allied with Mr. Erdogan, and the pro-Kurdish Peoples’ Democratic Party, or H.D.P., which supported Mr. Kilicdaroglu.

The first grew out of an underground Islamist group identified for murdering journalists, intellectuals and others in earlier a long time. The social gathering’s present leaders say they reject violence.

Turkey has fought a yearslong and lethal battle in opposition to Kurdish militants and the federal government typically accuses the H.D.P. of cooperation with the Kurdistan Workers’ Party, which Turkey, the United States and the European Union all take into account a terrorist group. H.D.P. leaders deny that accusation and say they condemn violence.

Mr. Ogan credited his marketing campaign with elevating nationalist causes in the course of the election and hard-right factions additionally fared properly in parliamentary elections. In specific, Mr. Erdogan’s strongest allies in Parliament, the Nationalist Movement Party, carried out higher than anticipated.

“We blew a very nationalist wind into the field,” Mr. Ogan stated.

But analysts stated it was extra seemingly that such sentiments had been already rising among the many citizens and Mr. Ogan simply occurred to catch the wave.

Gulsin Harman contributed reporting from Istanbul.