Mr Trump said he would "much prefer that Mitt focus on border security and so many other things where he can be helpful". "And clearly, if the President were able to get a $5 billion check to build the wall, that would look like a huge win for Republicans and a big loss for Democrats".
Romney's Washington Post op-ed praised a number of the president's policies but criticized his character.
Last chance to take advantage of our best offer of the year! "I don't think you're going to be able to reinvent yourself in the same way now. post-Trump world is an entirely different ball of wax". "For an incoming Republican freshman senator" to attack Trump, she tweeted, "is disappointing and unproductive".
With a government shutdown and a new party taking over the House of Representatives, it would be almost impossible for any newly elected official to get attention in Washington D.C. - unless they're Mitt Romney.
"To a great degree, a presidency shapes the public character of the nation", Romney said.
Romney remains a quintessential establishment Republican insider in the mold of former Arizona Senator Flake, former Tennessee Senator Bob Corker, and former Ohio Governor John Kasich.
It is unclear whether Mr Trump will face a serious challenge in 2020 to securing the Republican Party's presidential nomination. Dick Durbin, D-Ill., noted that nearly half the Senate Republicans are up for re-election in 2020 and some may feel the need to push back against Trump. 'I think it's early to make that decision.
Image Mr Trump said 'I won big and he didn't'
While Romney appears to be setting himself up to contend with the president - at least when it comes to character and leadership - Lee continues to strengthen his ties to Trump.
In his essay on Tuesday, Mr Romney vowed to speak his mind in Washington, which now includes a divided Congress as Democrats take control of the US House of Representatives following their November election gains.
Mr Romney was a critic of Mr Trump during his election campaign in 2016, calling him "very, very not smart" and accusing him of "lacking the temperament to be president". A vote tracker at FiveThirtyEight pegs him as voting with Trump 72.8 percent of the time.
Romney should correct his mistake and call the president to offer his opinion on how to end the shutdown and secure our border.
In his Tuesday column, Romney applauded Trump's policy moves on taxes, trade and others as advancing Republican priorities. "And it is in this province where the incumbent's shortfall has been most glaring".
Trump said during a Cabinet meeting Wednesday that he was surprised by Romney's comments.
But others, including Trump, had plenty to say about it.
"I do not intend to comment on every tweet or fault. A president should unite us and inspire us to follow 'our better angels'". "So sad, I wish everyone had the courage (Trump) had", Parscale wrote.
Marnus Labuschagne joins Australia teammates for fourth Test against India
They will start their campaign as soon as on January 3 (Thursday), when they face Australia at Sydney . This time the place and time is just right for him to make a healthy contribution in the middle order.