Bolivian President Carlos Mesa has announced his resignation after weeks of demonstrations against his government that have threatened to paralyze the landlocked South American country. In a televised address, Mesa said he would leave office once Bolivia's Congress, which must approve his resignation, chooses a successor. "I'm here to say, I can't go any further. It is my decision to present my resignation as the president of the Republic of Bolivia. "It is a resignation that has one objective and that objective is to let the Bolivian people know that this is genuine," Mesa was quoted as saying by CNN.