From the article:
"Protesters have accused Lee of being too eager to please the United States, even at the expense of the health of his own people.
Such criticism gained currency when it was revealed that South Korea had agreed to a less-restrictive beef importation deal than Taiwan and Japan did.
Lee offered no immediate comment on whether he would accept the offers of resignation by Prime Minister Han Seung Soo and other cabinet members. But their offers, coupled with an earlier offer by his top aides to resign, opened the way for Lee to overhaul his government for a new beginning as he tries to arrest his plummeting approval ratings.
On Monday, Lee sent a delegation to Washington to help defuse the crisis and amend the April deal so that the United States would not export beef from cattle older than 30 months, similar to the deals Japan and Taiwan reached with the United States. Younger cattle are believed to be less susceptible to mad cow disease."