Donald Trump’s visit to Capitol Hill on June 13th served as a reminder that—whatever the candidate promises—Congress would have a critical role in shaping policy if he returns to the White House. Although Republicans largely support their presumptive nominee and his programme, the finer points of a potential second-term agenda remain up for debate.

The Economist’s election-forecast model reckons that Donald Trump is more likely than not to retake the presidency. A Trump victory would probably be accompanied by Republicans gaining control of the Senate and perhaps expanding their majority in the House. Congressional Republicans are already considering the art of the possible should they do so.