President Joseph Kabila of the Democratic Republic of Congo has appointed the leader his political party as interior minister on Tuesday to oversee security in the face of rising militia violence and unrest over delayed elections. Henri Sakanyi, secretary-general of Kabila’s People’s Party for Reconstruction and Democracy (PPRD), replaces Emmanuel Shadari, another senior PPRD official, who had served in the post since December 2016. The reason for the change, announced in a communique read on national television, was not immediately clear. Shadari is considered a staunch Kabila loyalist and has…