Image copyright Getty Images Image caption New York's Trump Tower skyscraper is part of the empire

Donald Trump's business empire has seen revenue jump by $190m (£135m) since the real estate tycoon entered the US presidential race, according to newly released financial documents.

His controversial calls for a Muslim travel ban and deporting millions of undocumented immigrants appear not to have harmed his business interests.

Several firms severed ties with Mr Trump when he launched his campaign.

The gains mostly came from book royalties and his golf courses.

His latest book, Crippled America, generated between $1m and $5m in royalties, Mr Trump reported.

Revenue nearly doubled at Mr Trump's Mar-a-Lago resort in Florida from $16m to $30m. His bottled water line, Trump Ice, also saw growth.

He also appears to have benefited from the sale of Miss Universe Pageant, a move caused by his entry into politics.

Image copyright Getty Images Image caption Mr Trump's golf courses were one of the main sources of growth

Image copyright Getty Images Image caption Revenue nearly doubled at Mr Trump's Mar-a-Lago resort in Florida

Mr Trump sold his stake in the contest for $49m after he called Mexican immigrants "rapists" and "criminals" when he launched his campaign in June 2015.

The pageant had been valued between $5m and $25m in a previous financial discourse report.

The information in documents released by the Federal Election Commission (FEC) is self-reported.

Mr Trump says his net worth is about $10bn but the figure has been disputed.

Bloomberg news service and Forbes Magazine have estimated his actual net worth to be less than $4bn.

Image copyright Reuters Image caption Mr Trump has lent his name to dozens of products including wine, steaks and bottled water

Mr Trump has resisted calls to release his tax returns - a common practice among presidential candidates since the early 1970s.

Critics - including former Republican presidential candidate Mitt Romney - say Mr Trump's tax returns would give a more accurate accounting of his finances and shed light on his charitable giving.

Mr Trump has said his lawyers have advised him not to release his tax returns while he's being audited.

The Internal Revenue Service has said individuals are not prohibited from releasing returns while being audited.