Rep. Jung Sung-ho said in a news briefing that Yoon Chang-jung is a person with distorted political views and espouses "extreme rightist" values and engaged in divisive comments and actions in the past.
"Yoon has accused the opposition of being anti-Korean and his appointment is a sign that Park is focused on consolidating her own supporters and a sign she will go her own way in the running of the country instead of seeking national reconciliation," the party spokesman said.
This view was echoed by Rep. Yun Kwan-suk, who said Yoon's past actions indicate that he could further divide the country between those that supported Park during the presidential campaign and those that rooted for DUP candidate Moon Jae-in.
Park, the standard bearer for the ruling Saenuri Party won 51.6 percent of the 30.7 million votes cast last Wednesday, while Moon won 48 percent.
President-elect Park Geun-hye's new chief spokesman speaks to reporters at Saenuri Party headquarters in Seoul on Dec. 25, 2012. (Yonhap)
In response to the criticism leveled at him, Yoon, who worked for several media outlets in the past and ran his own online political commentary blog for the past year, said he deeply regretted any pain he may have caused and pledged that in the future he will do his best to reflect the authority of the president-elect in the running of the country.
"I will do my utmost to help Park become a president who units the country, keeps promises and places the importance of the people's welfare and their livelihoods above all else," he told reporters.
He also said that while he was harsh towards the DUP and some of its prominent supporters, he had also criticized Park in the past as well.
"In this respect I maintained balance and to say that I have leaned towards one side is not correct," he argued.
The official added that prior to receiving Park's nod to fill the key post, he did not know the president-elect personally.
Besides Yoon, the president-elect named former vice culture minister Park Sun-kyoo and former ruling party lawmaker Cho Yoon-sun as her spokesman and spokeswoman.
The DUP, meanwhile, said it opposes moves by Saenuri to set aside an extra 6 trillion won to help Park push forward with her welfare programs in 2013.
The party made clear that the ruling camp needs to come up with the extra cash by cutting unnecessary expenditures and increasing state revenues as promised by the president-elect during her campaign.
Saenuri officials have started hinting that Seoul may have to issue state bonds to make up for the shortage of funds.