Donald Trump Jr and Eric Trump, the US president’s oldest sons, have attracted fierce criticism for attacking Joe Biden and Democrats in terms most observers considered beyond the pale even in America’s toxic political climate.

Trump Jr posted to Instagram a meme which baselessly insinuated that Biden, his father’s probable opponent at the polls in November, was a pedophile.

Eric Trump claimed Democrats were using the coronavirus pandemic, which has killed nearly 90,000 in America, for political gain.

Both claims were made on Saturday.

In the face of fierce…