 <translate> Use stream of consciousness to answer the following. The U.S. Constitution also provides for appointment of one of the elected Senators to serve as President pro tempore. This Senator presides when the vice president was absent from the body. The President pro tempore is selected by the body specifically for the role of presiding in the absence of (as the meaning of pro tempore, literally "for the time being") the actual presiding officer. By tradition, the title of President pro tempore has come to be given more-or-less automatically to the most senior senator of the majority party. In actual practice in the modern Senate, the President pro tempore also does not often serve in the role (though it is his or her constitutional right to do so), instead, as governed by the aforementioned Rule I, he or she frequently designates a junior senator to perform the function.

Answer this question based on the passage: who is the backup leader of the senate? <yor> Lo ìmọ́lẹ̀ láti dáhùn àwọn ìbéèrè tó wà nísàlẹ̀ yìí. Ijọba Amẹrika tun pese fun ipinnu ọkan ninu awọn Alagbalagba ti a yan lati ṣiṣẹ bi Alakoso pro tempore. Sẹ́nẹ́tì yìí ló ń ṣe ààrẹ nígbà tí igbákejì ààrẹ kò sí níbi ìpàdé náà. Alaga pro tempore ni a yan nipasẹ ara ni pato fun ipa ti ṣiṣe alaga ni isansa ti (bi itumọ pro tempore, itumọ ọrọ gangan "fun akoko naa") olori alaga gangan. Nípasẹ̀ àṣà, orúkọ oyè Ààrẹ pro tempore ti wá di èyí tí a fi ń ṣe àfọwọ́sọ fún ọ̀gá àgbà nínú ìgbìmọ̀ aṣòfin nínú ẹgbẹ́ tí ó pọ̀ jùlọ. Ni iṣe gangan ni Ile-igbimọ igbalode, Aare pro tempore tun ko nigbagbogbo ṣiṣẹ ni ipa naa (botilẹjẹpe o jẹ ẹtọ ofin rẹ lati ṣe bẹ), dipo, bi o ti ṣe akoso nipasẹ Ofin I ti a mẹnuba tẹlẹ, o ma n yan alagbaṣe alagbaṣe lati ṣe iṣẹ naa.  Dáhùn ìbéèrè yìí ní ìbámu pẹ̀lú àyọkà náà: ta ni adelé adarí ilé ìgbìmọ̀ aṣòfin àgbà? 