Bloomberg attack ad contrasts Trump's foul-mouthed outbursts with inspiring statements from former presidents

Billionaire White House hopeful attacks incumbent in yet another scathing ad

Mike Bloomberg has released another critical advertisement against Donald Trump as the former New York City mayor campaigns for the White House, comparing some of his most incendiary comments to inspiring speeches made by former presidents.

The ad begins with John F Kennedy’s historic inaugural address from 1961, in which the former president said, “Ask not what your country can do for you, ask what you can do for your country”.

It then cuts to a video in which Mr Trump can be heard calling the investigations into Russian interference in the 2016 election “bulls***”.

The ad continues to intersperse controversial statements from the current president with powerful messages from his predecessors.

The video cuts between Mr Trump stating “I could stand in the middle of Fifth Avenue and shoot somebody, and I wouldn’t lose any voters” and a clip from Lyndon Johnson’s special message to Congress in which he called for equal voting rights.

Mr Bloomberg posted the ad to Twitter on Sunday, writing in a caption: “Our country has a rich history of presidents who respected the power, decorum, and influence of their office.”

He added: “Unfortunately, that rich history ended the day Trump became president.”

The advertisement does not show any clips of Mr Bloomberg, though it features the former mayor’s logo and ends with a statement reading: “Let’s bring presidential back.”

The presidential candidate’s late addition to the already-crowded Democratic primaries has riled up Mr Trump, who dubbed him “Mini Mike” and attacked him in a series of tweets in recent weeks.

“Mini Mike is part of the Fake News,” Mr Trump wrote earlier this month. “They are all working together.”

Mr Trump and Mr Bloomberg released duelling $10m (£7.73m) ads during the Super Bowl.

Mr Bloomberg has meanwhile ramped up spending on ads and staffing for his campaign after the Iowa caucus, in which results were severely delayed following issues with an app the state Democratic Party used to report vote counts.