On Tuesday, New York City Mayor Bill de Blasio released his tax returns for 2016, and he took a swipe at President Trump for not doing the same.

"See, President Trump? It's not that hard," de Blasio tweeted, with a link to the complete federal and state tax returns he and his wife, Chirlane McCray, filed for 2016.

De Blasio and McCray declared a combined income of $220,651 last year, with almost half of that ($106,000) coming from rent on two Brooklyn apartments they own.

"We won't bore you with the endless excuses our president has made. We'll just say this: No one forces any of us to run for public office, but those in public office must be transparent about our finances," the mayor wrote in a blog post.

Democrats have been calling on Trump to release his tax returns, as there are decades of precedent for presidents doing so.

Trump and his advisers have maintained that he will not release them because they are under audit, even though the IRS says the audit doesn’t prevent Trump from making his records public.

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