Donald Trump says he has no plans to launch a new political party, telling a conservative conference in Florida that it would split the Republican vote.
In his first speech since Democrat Joe Biden became president, he also hinted that he might run for office again in 2024.
Mr Trump strongly criticised his successor, saying US policy had gone from “America first to America last”.
The speech comes weeks after Mr Trump was acquitted in an impeachment trial.
His appearance at the Conservative Political Action Conference (CPAC) in Orlando on Sunday represents his continued influence over the Republican Party.
The 74-year-old former president was cheered by supporters when he appeared on stage at the Hyatt Regency Hotel more than an hour late. Many people in the crowd were not wearing masks.
“I stand before you today to declare that the incredible journey we began together four years ago is far from over,” he said.
“We are gathered this afternoon to talk about the future – the future of our movement, the future of our party, and the future of our beloved country.”
He dismissed any idea that he might start a new political party – describing rumours he would do so as “fake news”.
“Wouldn’t that be brilliant? Let’s start a new party so we can divide our vote and never win,” he joked.
“We have the Republican Party. It’s going to unite and be stronger than ever before.”
Despite losing November’s presidential election and being deeply criticised over the January riot, reports suggest Mr Trump remains extremely popular among his voting base.