Aaron Klein (Hebrew: אהרון קליין; born 1979) is an American-Israeli conservative political commentator, journalist, strategist, bestselling author and senior advisor to former Prime Minister Benjamin Netanyahu. He served as campaign manager for Netanyahu's election campaign for the March 2021 election and as chief strategist for Netanyahu's successful 2020 election campaign. Klein was Netanyahu's full-time chief strategist from 2020 to 2021, during the period Netanyahu was prime minister of Israel's 36th government. He played a role in Donald Trump’s 2016 presidential campaign.