Donald Trump has revealed US plans to form an 'impenetrable cyber security unit' with Russia, before again blaming Barack Obama for not stopping the Russian interference.

Trump fired up his Twitter account on Sunday morning and sent out a series of statements about his meeting with Putin at the G20 summit in Hamburg, Germany, this week.

The president's first tweet focused on what he claims are 'bad trade deals' with Europe, before turning his attention to the Russian election hacking.

'I strongly pressed President Putin twice about Russian meddling in our election. He vehemently denied it. I've already given my opinion.....,' he wrote, running out of characters mid-sentence.

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Donald Trump claimed on Twitter he confronted Vladimir Putin over Russia's interference in the 2016 election at the G20 summit. Trump and Putin are pictured laughing

'...We negotiated a ceasefire in parts of Syria which will save lives. Now it is time to move forward in working constructively with Russia!

'Putin & I discussed forming an impenetrable Cyber Security unit so that election hacking, & many other negative things, will be guarded.. ... and safe.'

Later in the day, Trump again tweeted about the Syria ceasefire, suggesting it could be a topic discussed heavily in the week ahead.

'Syrian ceasefire seems to be holding. Many lives can be saved. Came out of meeting. Good!' he wrote. The ceasefire deal was reached by the US, Russia, and Jordan, calling it a 'de-escalation agreement'.

The agreement followed weeks of secretive talks between the three countries in Amman to address the buildup of Iranian-backed forces near the Jordanian and Israeli borders.

Earlier, Trump's cyber plan was almost immediately attacked, with Florida Republican Marco Rubio blasting the proposal.

'Partnering with Putin on a "Cyber Security Unit" is akin to partnering with Assad on a "Chemical Weapons Unit",' Rubio wrote.

'We have no quarrel with Russia or the Russian people. Problem is with Putin & his oppression, war crimes & interference in our elections.'

Democrat Adam Schiff also trashed the plan, speaking with CNN on Sunday morning.

'How can we really believe the president pressed Putin hard, when only the day before he was denying whether we really knew Russia was responsible?' Schiff said.

'What kind of a tough negotiator, the way the president likes to portray himself, goes into a negotiation betraying his own position the day before? Calling into question the probity of his own intelligence agencies, that just doesn't make any sense.

'Then to say, "OK it's been resolved now we can move on", I don't think we can move on. I don't think we can expect the Russians to be any kind of a credible partner in some cyber security unit, I think that would be dangerously naive for this country if that's our best election defense, we might as well just mail our ballot boxes to Moscow.'

Meanwhile, Trump, as he is wont to do, was then directing his Twitter bile towards the Democrats and President Obama.

'Questions were asked about why the CIA & FBI had to ask the DNC 13 times for their SERVER, and were rejected, still don't....,' he wrote.

'...have it. Fake News said 17 intel agencies when actually 4 (had to apologize). Why did Obama do NOTHING when he had info before election?'

"How can we really believe that the President pushed Putin hard?" says @RepAdamSchiff #CNNSOTU https://t.co/t1NIurJmI1 — CNN (@CNN) July 9, 2017

'I strongly pressed President Putin twice about Russian meddling in our election. He vehemently denied it. I've already given my opinion,' Trump wrote on Twitter Sunday morning

Donald Trump discussed his meeting with Putin, attacked the DNC and President Obama, called out 'fake news', and said Russia will not face new sanctions - all in the space of six tweets

Trump returned to Twitter on Sunday afternoon to talk-up the ceasefire in Syria, which was reached after weeks of negotiations between the US, Russia, and Jordan

The president's claim about President Obama not doing anything is not true, as it has previously been revealed Obama spoke to Putin about the hacking in September, and he worked in the final few months leading up to the election to ensure no voting systems could be hacked.

Democrats have also spoken about why Obama did not do more, with Al Franken telling MSNBC's Morning Joe last month the former President and his team: 'didn't want to look like they were putting a thumb on the scale and that's why they didn't do more'.

Trump's claim about the four intelligence agencies is also factually incorrect, as six chiefs - DIA Director General Vincent Stewart, NSA Director Michael Rogers, Director of National Intelligence Dan Coats, CIA Director Mike Pompeo, acting FBI Director Andrew McCabe, and National Geospatial-Intelligence Director Robert Cardillo - all said 'Russian intelligence agencies' were behind the election hacking, CNN reports.

A few minutes later on Sunday morning, Trump revealed he did not discuss potential punishments for Russia's meddling in the election.

'Sanctions were not discussed at my meeting with President Putin. Nothing will be done until the Ukrainian & Syrian problems are solved!' he wrote.

The tweets come after it was revealed members of his team - including Donald Trump Jr and Jared Kushner - met with a Kremlin lawyer at Trump Tower just two weeks after he won the Republican nomination last year.

Putin and Donald Trump are pictured during a bilateral meeting on the sidelines of the G20 summit in Hamburg on July 7

Vladimir Putin and Donald Trump shake hands during their meeting at the G20 summit in Germany this meet

Trump then accused President Barack Obama of not stopping Putin from hacking the election. Obama is pictured meeting with Putin during a G20 meeting in September 2016

The Trump Tower meeting, which took place on June 9, 2016 and has never before been disclosed, was attended by then-campaign chairman Paul Manafort, Kushner, and Don Jr - who is accused of organizing the meeting, the New York Times reports.

This is the first confirmed meeting between Trump associates and figures tied to the Russian government, according to the Times, which cited confidential government records.

'It was a short introductory meeting,' Trump Jr told the Times. The newspaper identified the Russian attorney as Natalia Veselnitskaya.

The wife of a former deputy transportation minister, Veselnitskaya is best known for her public attacks on American sanctions legislation aimed at Russian human rights abusers.

The Magnitsky Act imposed visa bans and asset freezes on Russian officials linked to the 2009 death in prison of Sergei Magnitsky, a 37-year-old Russian whistleblower.

Russia has demanded that the US repeal the legislation since its passage in 2012.