Donald Trump declared “the silent majority is stronger than ever before” at his comeback rally on Saturday, but thousands of empty seats appeared to tell a different story.

The US president’s much hyped return to the campaign trail turned to humiliation when he failed to fill a 19,000-capacity arena in the Republican stronghold of Oklahoma, raising fresh doubts about his chances of winning re-election.

“The Emperor has no crowd,” tweeted Dan Pfeiffer, a former senior adviser to Barack Obama.