The site had previously encouraged readers to "Steal Our Stories" by making its investigations data available online.
But a new "Republish" button at the top of articles, introduced as part of a site redesign, now makes the html of articles available to copy and paste elsewhere.
The articles are licensed under a Creative Commons Attribution-NonCommercial-NoDerivs licence, which requires users to credit ProPublica with a byline and link. Articles cannot be edited except to reflect changes in time, location or editorial style.
In the UK, the Guardian recently launched a "plugin" feature for WordPress to allow users of the blogging software to embed whole Guardian.co.uk articles on their sites.
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