Output a stream of consciousness before answering the following. Passage: Formerly, the vice president would preside regularly over Senate proceedings, but in modern times, the vice president rarely presides over day-to-day matters in the Senate; in their place, the Senate chooses a President pro tempore (or "president for a time") to preside in the vice president's absence; the Senate normally selects the longest-serving senator in the majority party. The President pro tempore has the power to appoint any other senator to preside, and in practice junior senators from the majority party are assigned the task of presiding over the Senate at most times.

Question: Based on this passage, who takes the vice president's place in senate?
The important part for answering this question is: Formerly, the vice president would preside regularly over Senate proceedings, but in modern times, the vice president rarely presides over day-to-day matters in the Senate; in their place, the Senate chooses a President pro tempore (or "president for a time") to preside in the vice president's absence; the Senate normally selects the longest-serving senator in the majority party.
The answer: a President pro tempore ( or '' president for a time '' ).