US President Donald Trump says Joe Biden will “demolish” the American dream if he emerges winner of the US presidential election in November.

Mr, Trump referred to his Democratic challenger as “the destroyer of American greatness” , while making comments on the final night of the Republican convention, BBC reports.

Speaking further, he also stated that the Democrats would unleash “violent anarchists” upon US cities.

With 68 days till voters return their verdict, Mr Biden has a steady single-digit lead in opinion polls over Mr Trump.

On the nature of forth coming election, there are speculations that the coming campaign is widely expected to be one of the ugliest in living memory, as the end of the Republican convention heralds a 10-week sprint to Election Day.

Meanwhile, the president asked voters for another four years in office, on Thursday night.

He also vowed to dispel the coronavirus pandemic that has ravaged the US economy and quell civil strife ignited by police killings of African Americans.