President Trump Donald John TrumpBiden on Trump's refusal to commit to peaceful transfer of power: 'What country are we in?' Romney: 'Unthinkable and unacceptable' to not commit to peaceful transition of power Two Louisville police officers shot amid Breonna Taylor grand jury protests MORE early Wednesday mocked Joe Biden Joe BidenBiden on Trump's refusal to commit to peaceful transfer of power: 'What country are we in?' Democratic groups using Bloomberg money to launch M in Spanish language ads in Florida Harris faces pivotal moment with Supreme Court battle MORE's rollout of his climate plan, complained about press coverage and blasted ongoing Democratic investigations into his administration in the hours before he attended a ceremony commemorating the 75th anniversary of D-Day.

The president fired off seven tweets between 6:55 a.m. and 9:20 a.m. local time, largely commenting on news from the U.S. while he's been on a state visit in the United Kingdom.

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Trump hit Biden after the Democratic presidential hopeful unveiled a plan to battle climate change that contained multiple passages lifted from climate policy think tanks. The former vice president's campaign later acknowledged the issue and updated the proposal with citations.

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Plagiarism charge against Sleepy Joe Biden on his ridiculous Climate Change Plan is a big problem, but the Corrupt Media will save him. His other problem is that he is drawing flies, not people, to his Rallies. Nobody is showing up, I mean nobody. You can’t win without people! — Donald J. Trump (@realDonaldTrump) June 5, 2019

"Plagiarism charge against Sleepy Joe Biden on his ridiculous Climate Change Plan is a big problem, but the Corrupt Media will save him," Trump tweeted. "His other problem is that he is drawing flies, not people, to his Rallies. Nobody is showing up, I mean nobody. You can’t win without people!"

Trump's state visit to Japan a week earlier was largely overshadowed by his repeated criticism of Biden.

The president on Tuesday morning also shared a quote attributed to House Minority Leader Kevin McCarthy Kevin Owen McCarthyMcCarthy threatens motion to oust Pelosi if she moves forward with impeachment Kate Schroder in Ohio among Democratic challengers squelching GOP hopes for the House McCarthy's Democratic challenger to launch first TV ad highlighting Air Force service as single mother MORE (R-Calif.) supporting his threat of tariffs against Mexico.

He additionally weighed in on Democratic investigations in the House after news broke that the White House instructed former officials Hope Hicks Hope Charlotte HicksSenate intel leaders said Trump associates may have presented misleading testimony during Russia probe: report Cuomo turned down Trump invitation to participate in April press briefing: report Trump shakes up White House communications team MORE and Annie Donaldson not to comply with document requests from the House Judiciary Committee.

"House Democrats, fresh off a Republican victory against them (in Federal Court) on the Wall, keep asking people to come and testify regarding the No Collusion Witch Hunt," Trump tweeted. "They are very unhappy with the Mueller Report, especially with his corrective letter, & now want a Do Over!"

House Democrats, fresh off a Republican victory against them (in Federal Court) on the Wall, keep asking people to come and testify regarding the No Collusion Witch Hunt. They are very unhappy with the Mueller Report, especially with his corrective letter, & now want a Do Over! — Donald J. Trump (@realDonaldTrump) June 5, 2019

Democrats in the House are investigating the Trump administration for abuse of power and corruption, but the White House has stonewalled requests for documents and testimony.

Trump also took aim at another familiar target prior to the D-Day ceremony in Portsmouth, England, hitting the news media over what he perceived as unfair coverage. The president claimed the press was holding back his poll numbers, which have remained in the low or mid-40 percent range for the majority of his term.

"If the totally Corrupt Media was less corrupt, I would be up by 15 points in the polls based on our tremendous success with the economy, maybe Best Ever!" Trump tweeted. "If the Corrupt Media was actually fair, I would be up by 25 points. Nevertheless, despite the Fake News, we’re doing great!"

If the totally Corrupt Media was less corrupt, I would be up by 15 points in the polls based on our tremendous success with the economy, maybe Best Ever! If the Corrupt Media was actually fair, I would be up by 25 points. Nevertheless, despite the Fake News, we’re doing great! — Donald J. Trump (@realDonaldTrump) June 5, 2019

Trump typically receives positive marks on his handling of the economy, but low marks in other areas such as foreign policy. A RealClearPolitics average of polls shows Trump's approval during his first term has peaked at 46 percent.

The president also continued to fixate on coverage of protests of his visit, emphasizing that he was treated warmly.

Thousands of protesters gathered in London to voice their displeasure with Trump's state visit. But the president has commented during each day of his trip that he did not witness the large-scale demonstrations, but only saw positive reactions to his presence.

"I kept hearing that there would be 'massive' rallies against me in the UK, but it was quite the opposite," Trump tweeted Tuesday morning. "The big crowds, which the Corrupt Media hates to show, were those that gathered in support of the USA and me. They were big & enthusiastic as opposed to the organized flops!"

Trump may not have seen the full scale of the protests, as his visit was largely contained to cordoned-off parts of central London.

He added in a separate tweet that he "could not have been treated more warmly in the United Kingdom by the Royal Family or the people."

I kept hearing that there would be “massive” rallies against me in the UK, but it was quite the opposite. The big crowds, which the Corrupt Media hates to show, were those that gathered in support of the USA and me. They were big & enthusiastic as opposed to the organized flops! — Donald J. Trump (@realDonaldTrump) June 5, 2019

Could not have been treated more warmly in the United Kingdom by the Royal Family or the people. Our relationship has never been better, and I see a very big Trade Deal down the road. “This trip has been an incredible success for the President.” @IngrahamAngle — Donald J. Trump (@realDonaldTrump) June 5, 2019

The president arrived at the D-Day ceremony in Portsmouth at about 11 a.m. local time. He is set to meet with veterans of the invasion later on Wednesday before departing for Ireland. He will attend another D-Day commemoration in Normandy on Thursday.