How These Ultrawealthy Politicians Avoided Paying Taxes

As a member of Congress, Jared Polis was one of the loudest Democrats demanding President Donald Trump release his tax returns.

At a rally in Denver in 2017, he warned the crowd that Trump “might have something to hide.” That same year, on the floor of the House, he introduced a resolution to force the president to release the records, calling them an “important baseline disclosure.”

But during Polis’ successful run for governor of Colorado in 2018, his calls for transparency faded. The dot-com tycoon turned investor broke with recent...