WASHINGTON -- President Donald Trump said Saturday he has "complete power" to issue pardons, an assertion that comes amid investigations into Russian interference in last year's presidential election.

It was one of many topics that appeared to occupy the president's mind as the day began.

In an early morning flurry of 10 tweets, he commented about pardons, former presidential rival Hillary Clinton, son Don Jr., health care, the USS Gerald Ford, the attorney general and other issues.

Trump said in one of his 10 messages: "While all agree the U.S. President has the complete power to pardon, why think of that when only crime so far is LEAKS against us. FAKE NEWS."

The Washington Post recently reported Trump has inquired about the authority he has as president to pardon aides, relatives or himself in connection with the widening investigation into Russian interference in the election and whether any Trump associates were involved.

The president has criticized leaks of information about the investigation, and has urged authorities to prosecute leakers.

Trump maintains no crimes have been committed.

One of Trump's attorneys, Jay Sekulow, said the president has not discussed the issue of pardons with his outside legal team.

This week, Trump's eldest son, Donald Trump Jr.; his son-in-law and White House adviser, Jared Kushner; and Paul Manafort, his former campaign chairman, are scheduled to appear before Senate committees investigating Russian meddling.

Trump defended his son in one of the tweets, saying he "openly gave his e-mails to the media & authorities whereas Crooked Hillary Clinton deleted (& acid washed) her 33,000 e-mails!"

Trump's namesake has become a focus of the investigation after it was revealed he, Kushner and Manafort met with Russian representatives at Trump Tower in June 2016. Trump Jr. later released email exchanges concerning the meeting on Twitter, after learning The New York Times was about to publish them.

The FBI investigated Clinton for using a private email server as secretary of state. She turned over thousands of pages of emails to the government, but deleted thousands of others she said were personal or unrelated to her work as the nation's top diplomat.

Trump also complained Saturday about a Washington Post report the Russian ambassador to the U.S. said he discussed election-related issues with Jeff Sessions when the men met during the 2016 presidential race. Sessions, now the attorney general, at the time was a U.S. senator and foreign policy adviser to Trump.

Trump tweeted: "A new INTELLIGENCE LEAK from the Amazon Washington Post, this time against A.G. Jeff Sessions. These illegal leaks, like Comey's, must stop!"

The Post on Friday cited anonymous U.S. officials who described U.S. intelligence intercepts of Ambassador Sergey Kislyak's descriptions of his meetings with Sessions.

The Justice Department said Sessions stands by his previous assertion that he never had conversations with Russian officials about any type of interference with the election.

Trump also said "Republican Senators must step up to the plate and, after 7 years, vote to Repeal and Replace" the Obama-era health care law. An effort to advance legislation collapsed in the Senate earlier this week after several Republicans said they wouldn't vote for the bill.

Trump ended the tweet with "Tax Reform and Infrastructure. WIN!"