NEW : He will stay in place until a successor is chosen , Chancellor Angela Merkel says . The resignation could affect Merkel 's government . Karl-Theodor Freiherr zu Guttenberg is quitting all political posts , he says . Comment:
NEW : He will stay in place until a successor is chosen , Chancellor Angela Merkel says . The resignation could affect Merkel 's government . Karl-Theodor Freiherr zu Guttenberg is quitting all political posts , he says . He is accused of copying parts of his doctoral dissertation .