There are several ways to express the phrase "send to the hot seat". One alternative is "put in the spotlight", which implies that the person is being observed or scrutinized. Another option is "subjected to interrogation", which emphasizes the process of questioning and seeking answers. A more colloquial phrase is "thrown under the bus", which suggests the person is being sacrificed for the benefit of others. "Scapegoated" is a similar term with a more negative connotation, implying unjust blame. Finally, "placed under scrutiny" is a more neutral option that simply states the person is under investigation or examination.