Mid-November 2022, post mid-term elections. Various media outlets are reporting that Trump is furious with the lack of a Republican “red wave” sweeping the nation

I know American and UK/European politics are somewhat reversed in that in the UK and other countries you become Prime Minister of the country by virtue of being elected as leader of the biggest party, whereas in the States you become the leader of your party by being elected as President (or the highest ranking position that party currently holds such as Speaker of the House). Given that Donald Trump doesn’t currently hold any political office, does he have any official authority in the GOP? Is he the current “leader” and can he take any official actions against those he sees as to blame for this apparent failing?