Police buses are lined up near the presidential residence in central Seoul's Hannam-dong, Monday. Yonhap

The release of President Yoon Suk Yeol from jail has pushed up public support for the ruling People Power Party (PPP) and increased anticipation for the ruling bloc to stay in power, a public opinion poll showed Monday.

The survey indicates the release, following a local court decision that his detention was invalid due to technicalities, is affecting public sentiment on the president's martial law fiasco and the ongoing impeachment trial at the Constitutional Court.

According to the weekly poll, conducted by Realmeter from Wednesday to Friday on 1,507 adults nationwide, the PPP's approval rating stood at 42.7 percent, slightly ahead of the main opposition Democratic Party of Korea's (DPK) 41 percent.

The support rate for the PPP rose by 5.1 percentage points from a week before, while the DPK lost 3.2 percentage points.

At the same time, 50.4 percent of the respondents said they want the opposition bloc to take power in the next government, down from 55.1 percent the previous week, while 44 percent preferred the PPP stay in power, up from 39 percent.

The poll result is a reversal of the trend in recent weeks in which the PPP had been losing support and support for the DPK had been rising, and a growing number of people had anticipated a candidate from the opposition bloc to become president if Yoon is impeached and a snap presidential election is called.

The pollster said this shift has partially been attributed to the court's decision on Friday to release Yoon from detention, as the survey was conducted through that day. Yoon was released the following day after 52 days in detention.

However, some political pundits say it is too early to say that Yoon's release was the main cause of this shifting trend and, even if it had been, the trend will likely continue, because the release decision came on the last day of the survey.

"Realmeter uses an automated response system (ARS) for its polls, which are conducted through machine-generated voices. This method tends to attract responses from more committed supporters," said Shin Yul, a political commentator and political professor at Myongji University.

President Yoon Suk Yeol, released from Seoul Detention Center, greets supports as he gets out of his car in front of the presidential residence in central Seoul's Hannam-dong, Saturday. Yonhap

Rep. Kwon Young-se, head of the PPP's emergency committee, and Rep. Kweon Seong-dong, the ruling party's floor leader, met Yoon at his residence for about 30 minutes on Sunday, a day after the president was released.

Shin Dong-uk, the party's senior spokesperson, told reporters at the National Assembly the following day that the two leaders had visited Yoon's residence in Seoul from 8 p.m. to 8:30 p.m.

"The meeting wasn't long, lasting for about 30 minutes, considering various factors (surrounding the current situation). They didn't have dinner; they just had a cup of tea and discussed the president's health and the thoughts he had during his time in detention," Shin said.

"Yoon expressed gratitude to them for managing the party properly while he was in prison."

Shin said the participants did not talk about Yoon's plans for any political activities in the near future.

He added the party's emergency committee does not have any additional plans for meetings with the president for the time being.

The Realmeter poll was commissioned by Energy Economy Newspaper. It has a margin of error of plus or minus 2.5 percentage points, with a credibility rate of 95 percent. Further details are available on the National Election Survey Deliberation Commission's website.