The top lawyer at the Republican Party is resigning after he cited conflicts with his other work obligations and after Donald Trump grew angry about his criticism of the former president’s false claims that the 2020 election was stolen, people familiar with the situation said Saturday night.

The lawyer, Charlie Spies, is a long-respected GOP election operative who was hired by Trump’s top lieutenants in March after the former president engineered a takeover of the Republican National Committee, which in recent years has been the party’s main operation in both fundraising and field operations.