In Washington, relationships come and go. In a quick succession of phone calls on Tuesday, Joe Biden exited negotiations with Sen. Shelley Moore Capito (R-W.Va.) and started them with Sen. Bill Cassidy (R-La.). Could a compromise on infrastructure be on the way?\xa0\nRaghu Manavalan is the host of POLITICO's Playbook.Jenny Ament is the senior producer for POLITICO Audio.\xa0Irene Noguchi is the executive producer of POLITICO Audio.