A major new study out of Harvard University has revealed the true extent of the mainstream media’s bias against Donald Trump.

Academics at the Shorenstein Center on Media, Politics and Public Policy analyzed coverage from Trump’s first 100 days in office across 10 major TV and print outlets.

They found that the tone of some outlets was negative in as many as 98% of reports, significantly more hostile than the first 100 days of the three previous administrations:

The academics based their study on seven US outlets and three European ones.

In America they analyzed CNN, NBC, CBS, Fox News, the New York Times, the Washington Post and the Wall Street Journal.

They also took into account the BBC, the UK’s Financial Times and the German public broadcaster ARD.

Every outlet was negative more often than positive.

Only Fox News, which features some of Trump’s most enthusiastic supporters and is often given special access to the President, even came close to positivity.

Fox was ranked 52% negative and 48% positive.

The study also divided news items across topics. On immigration, healthcare, and Russia, more than 85% of reports were negative.

On the economy, the proportion was more balanced – 54% negative to 46% positive:

The study highlighted one exception: Trump got overwhelmingly positive coverage for launching a cruise missile attack on Syria.

Around 80% of all reports were positive about that.

The picture was very different for other recent administrations. The study found that President Obama’s first 100 days got a good write-up overall – with 59% of reports positive.

Bill Clinton and George W Bush got overall negative coverage, it found, but to a much lesser extent than Trump. Clinton’s first 100 days got 40% positivity, while Bush’s got 43%:

Trump has repeatedly claimed that his treatment by the media is unprecedented in its hostility.

This study suggests that, at least when it comes to recent history, he’s right.