Former US President Donald Trump dropped strong hints about a 2024 White House run at a Thursday rally in Sioux City, Iowa.

"The election was rigged and stolen and now our country is being destroyed," the Republican started telling the crowd.

"And now, in order to make our country successful, and safe and glorious, I will very, very, very probably do it again," Trump told cheering supporters, who started chanting his name shortly thereafter.