Melania Trump will not join her husband at the Camp David presidential retreat this weekend, extending to 22 days the time since she last appeared in public.

The First Lady was last seen on May 10 and underwent surgery for a “benign” kidney issue on May 14, spending a few days in hospital before being released.

Mrs Trump’s lack of appearance at events she would normally be expected to attend has created headlines in the US media and triggered conspiracy theories.

She addressed them on Wednesday, tweeting: "I see the media is working overtime speculating where I am & what I'm doing.

“Rest assured, I'm here at the White House [with] my family, feeling great, & working hard on behalf of children & the American people!”