Washington: President Donald Trump, facing lawsuits and political demands to release his US tax returns and other financial information, says he will release a statement on his finances before the presidential election, and asserts that it was his call on providing the information.

"I’m clean, and when I release my financial statement (my decision) sometime prior to election, it will only show one thing - that I am much richer than people even thought - And that is a good thing," Trump said in a post on Twitter on Thursday, providing no details on his claims of wealth.

Trump also said Special Counsel Robert Mueller's two-year investigation into Russian interference in elections, which most recently led to the criminal conviction of Trump's former adviser Roger Stone, showed that his finances were in order.

Mueller "went over all of my financials, & my taxes, and found nothing. Now the Witch Hunt continues with local New York Democrat prosecutors going over every financial deal I have ever done. This has never happened to President before. What they are doing is not legal," Trump wrote.