Murkowski, like Feinstein, is corrupt as hell. Feinstein was more than likely telling (threatening) Murkowski that those who bought and paid for her are not happy with the report that Murkowski will vote for Kavanaugh. Big Pharma, healthcare companies and the usual suspects, Boeing, Lockheed Martin,etc. all paid big bucks for Murkowski's votes. Here is the FEC report on Murkowski's campaign - scroll through the donations.
https://www.fec.gov/data/receipts/?two_year_transaction_period=2018&cycle=2022&data_type=processed&committee_id=C00384529&min_date=01%2F01%2F2017&max_date=09%2F27%2F2018&line_number=F3-11C