According to the search results, Chris Hayes, the host of "All In with Chris Hayes" on MSNBC, did not host his show during the week of September 25, 2023, but he has not announced any plans to leave the network. He was taking a vacation and spending time with his family and working on other projects. Chris Hayes has not left MSNBC, and he remains actively involved with the network and continues to host his show from Tuesday through Friday nights. Recently, MSNBC announced that former White House press secretary Jen Psaki will host a new show called "Inside with Jen Psaki" on Monday nights at 8 p.m., replacing an hour of "All In with Chris Hayes". However, Chris Hayes will continue to host his show on Tuesday through Friday nights.