"They didn't want to hurt Hillary?", Trump tweeted.
The President also tweeted his concerns Friday night and Saturday.
A former top official in the Obama administration told the Post that it was hard for him to explain what happened, adding that the administration "sort of choked" in their bid to arrest the situation.
Wall Street boosted by tech stocks, rebound in oil prices
June 26 (Reuters) - U.S. stocks were set to open higher on Monday as oil prices climbed from last week's seven-month lows. Micron was up 3.5 per cent at $32.85 after Cowen & Co increased its price target on the chipmaker's stock.
This comes after an Obama official told TheWashington Post newspaper the USA had failed to punish Russian President Vladimir Putin after learning of his intentions to meddle in the democratic process.
"As we have made clear to the Russian government and others, we will not tolerate attempts to interfere with the USA democratic process, and we will take action to protect our interests, including in cyberspace, and we will do so at a time and place of our choosing", the Obama administration told the two senators.
Mr Trump said Mr Obama had learned well before the 8 November poll about the accusations and "did nothing".
"Well I just heard today for the first time that Obama knew about Russian Federation a long time before the election, and he did nothing about it", Trump said in a "Fox and Friends" interview.
Watch Labour leader Jeremy Corbyn send Glastonbury festival wild with speech
During Friday's headline slot, Radiohead frontman Thom Yorke recited Mrs May's "strong and stable" election slogan, with crowds chanting "Oh, Jeremy Corbyn ".
The reports hinted that Obama only meted light punishment to Russia such as; shutting down two Russian compounds, expulsion of some diplomats, and lightly considered economic sanctions. Another measure, the planting of cyberweapons in Russia's infrastructure, was still in the planning stages when Obama left office. You've just been informed by the Central Intelligence Agency that Vladimir Putin has ordered a wide-ranging effort to disrupt the U.S. presidential election.
He repeats the argument in an interview with Fox News, which will air on Sunday.
"The reality is, in two or four years, it will serve Vladimir Putin's interest to take down the Republican Party", Rep. Adam Kinzinger, R-Ill., told CNN.
Qatar Rejects the Saudi-led Bloc's Absurd Demands
He continued: "The Islamic world requires unity and integrity and the two countries can undoubtedly work together in this regard". Erdogan said Turkey had offered to set up a military base in Saudi Arabia as well as Qatar , but Riyadh had not responded.
United States media say special counsel Robert Mueller is also investigating Mr Trump for possible obstruction of justice over the Russian Federation inquiries.
- SpaceX launches 10 satellites from California air base
- UK Conservatives, N Ireland party strike deal
- Airbag maker Takata files for bankruptcy protection in Japan
- Eyes have it: Ezekiel Elliott featured in ESPN's Body Issue
- SpaceX set to launch satellites from California air base
- Olympic Champion Jimmy Butler Traded To Minnesota Timberwolves
- Markelle Fultz calls selection by Sixers 'unreal'
- Trump, Saudi Crown Prince Discuss Qatar Row
- New study of Seattle's $15 minimum wage says it costs jobs
- India's President, Vice President, Speaker wish people on Eid-ul-Fitr