In its campaign to pressure elite US colleges to make a wide range of policy changes, the administration of President Donald Trump has come down hardest on Harvard University.

As the legal battle between the Trump administration and Harvard heats up, here's a look at what Harvard calls Trump's "campaign of retaliation" against the school.

As legal battles drag out, and possibly work their way up to a firmly conservative Supreme Court, the school is at an increasing disadvantage, some observers point out.