The former Republican US presidential candidate and incoming senator for Utah Mitt Romney has launched a scathing attack on Donald Trump, saying he has caused dismay around the world.
Writing in the Washington Post, he said Mr Trump had not "risen to the mantle" of the presidency.
Mr Romney has been fiercely critical of Mr Trump before but won his backing for his run in Utah.
There has been no response yet from the US president.
The timing of the article, just two days before Mr Romney is sworn-in, prompted some to speculate he was positioning himself as a challenger to Mr Trump securing the Republican presidential nomination.
What did the opinion piece say?
In the article, Mr Romney praised many of Mr Trump's policies, such his tax reforms and appointment of conservative judges, ones he said "mainstream Republicans have promoted for years".
But he went on to say: "With the nation so divided, resentful and angry, presidential leadership in qualities of character is indispensable. And it is in this province where the incumbent's shortfall has been most glaring."
"The world is also watching," he added. "Trump's words and actions have caused dismay around the world."
Mr Romney said he would support the president in policies he thought were in the best interests of Utah or the US but speak out against actions "that are divisive, racist, sexist, anti-immigrant, dishonest or destructive to democratic institutions".
What's the reaction been?
Mr Romney's article has been widely discussed and covered across US media. Several outlets suggested that Mr Romney was positioning himself to be Mr Trump's leading critic in Congress.
The New York Times even said much of the essay "sounded like the makings of a primary challenge against Mr. Trump from Mr. Romney".
On social media some praised Mr Romney, others said he should have gone further. Conservative commentators and pro-Trump writers have accused him of duplicity and opportunism.
What kind of relationship do the two men have?
A complicated one. During the 2016 campaign, Mr Romney said Mr Trump had neither "the temperament nor the judgement to be president" while Mr Trump called Mr Romney a "choke artist" and called his bid for the presidency in 2012 "the worst ever".
The same year though, the pair met for dinner amid reports Mr Trump was mulling appointing Mr Romney as his secretary of state.
Image copyrightGETTY IMAGES
Image captionThe two men met for dinner amid reports Mr Romney was a contender for secretary of state
Mr Romney has also taken issue with Mr Trump labelling the press the "enemy of the people" as well as his response to a violent far-right rally in Charlottesville.
When US Congress reconvenes on Thursday, Mr Trump faces a new challenge on the domestic front – in November's mid-terms the Republicans strengthened their hold of the Senate but lost the House of Representatives.
- I’m not foolish to set up Komenda Sugar Factory without plans for raw materials – Mahama
- UK MP Sir David Amess dies after stabbing
- It’s lame if my visa denial is associated with anti-LGBTQI+ Bill – Alhassan Suhuyini
- ‘I’ve never declared support for Alan Kyeremanten’ – Osafo Maafo denies viral social media post
- LGBTQ visa ‘sabotage’ against MPs: We’ll address allegations when Parliament resumes – Okudzeto Ablakwa
- ‘Small beginnings are important’ – Ken Ofori-Atta on life before politics
- SSNIT $66 million OBS Contract: Court orders state to file amended charge sheet by October 19
- It is not right for Ghana to retaliate – International Relations Consultant on Suhuyini’s botched visa application
- Black Stars: Milovan Rajevac needs to address the right-back shortcomings
- CAF Champions League: What is at stake for both Hearts and Samuel Boadu?
Don’t misconstrue groups against Anti-LGBTQ Bill as supporters of same-sex related activities – Dr Poku Adusei
Embassies’ denial of visas over Anti-LGBTQ bill amounts to imperialism – Economist
Anti-LGBTQ+ bill has lots of repetition and redundancy – Prof. Emerita Takyiwaa Manuh
CocoaSoils unveils training manual on soil fertility management
Anti-LGBTQ Bill won’t meet constitutional test going forward – Dr Poku Adusei
Killer lamps removed from 1,418 vehicles in one week – NRSA
Gomoa ban: Residents scramble for food, essentials
Teacher arrested for trading blows with student in classroom
Removal of price stabilisation and recovery levy won’t bring about reduction in fuel prices – Association of Oil Marketing Companies
Nicholas Opoku: Why proponents of Ghana’s ‘Anti-gay bill’ get it so wrong
UK MP Sir David Amess killing was terrorism, police say
4 UK female MPs to attend GUBA awards in Ghana
Playback: Newsfile discusses Anti-LGBTQ Bill, 7% hike in fuel prices and approval of 133 radio stations by NCA
Stone Gee’s set to release visuals for his party song ‘No More.’
Inflation to remain within 8% and 10% in 2021 – BoG