President Park Geun Hye has made some changes to her staff after her ruling Saenuri party’s rout in South Korea’s parliamentary elections last month.

She appointed Lee Won Jong, a former Seoul mayor who led the presidential committee on regional development, her new chief of staff, Blue House said in a statement posted on its website on Sunday. She accepted the resignation of Lee Byung Kee following the defeat in the April 13 general elections.

“I have fears and feel the heavy burden on my shoulder as I take on the role of assisting the president during the nation’s tough time,” Lee Won Jong said in another statement. “I will assist the president to make the most optimal decisions by cooperating with the rest of the secretary office.”

Park also appointed An Chong Bum as the new senior secretary to the president for policy coordination to increase efficiency in policy enforcement for the second half of the year, and Kang Seong Hoon, a Saenuri lawmaker and a former professor, as the new chief economic adviser, succeeding An.

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