The ex-president’s blog has drawn a considerably smaller audience than his once-powerful social media accounts, according to engagement data compiled with BuzzSumo, a social media analytics company. The data offers a hint that while Trump remains a political force, his online footprint is still dependent on returning to Facebook, Twitter and YouTube. The Desk of Donald J. Trump is limited — users can’t comment or engage with the actual posts beyond sharing them to other platforms, an action few people do, according to the data. Trump’s new blog has attracted a little over 212,000 engagements, defined as backlinks and social interactions — including likes, shares and comments — received across Facebook, Twitter, Pinterest and Reddit. Before the ban, a single Trump tweet was typically liked and retweeted hundreds of thousands of times.