From its home on the banks of Mark Twain’s Mississippi river to its dedication to using American steel, the Winegard Company is the sort of flag-waving, family owned US manufacturer that Donald Trump loves to celebrate.

The satellite television dishes that its Burlington, Iowa, factory punches out every three or four seconds sit on roofs across the US, while its domed antennas bring mobile internet and TV to legions of grandparents criss-crossing the country in recreational vehicles.

But these days executives at the company, based in one of the many Midwest counties that Mr Trump won in last year’s election, are bemused with the president.