President Donald Trump spent his Saturday morning on a Twitter bender, retweeting more than 60 tweets as of 9:30 a.m. ET.

The tweets touched on a multitude of issues that have been on Trump's mind lately, most prominently the Russia investigation and a recent Senate Intelligence Committee subpoena of his son, Donald Trump Jr.

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President Donald Trump's activity on Twitter always seems to peak in the early morning hours, but on Saturday he seemed even more keyed in than usual — retweeting more than 60 tweets before 9 a.m. ET.

The tweets covered a range of topics that have been on his mind lately, but he seemed particularly focused on issues related to the special counsel Robert Mueller's Russia investigation and the sprawling congressional inquiries that have taken off as a result of Mueller's final report being released last month.

The president also retweeted some tweets discussing the ongoing trade war with China, immigration and border patrol, and other platforms he plans to run on during the 2020 election.

Pictured above is a small sample of the president's more than 60 retweets Saturday morning. Twitter

Read more: Trump 'marveled' at the fact one of his tweets seemed to move the stock market

But the vast majority of Trump's retweets zeroed in on the Russia investigation.

They attacked former FBI and Justice Department officials who were involved in compiling or approving the Foreign Intelligence Surveillance Act (FISA) warrant targeting the former Trump campaign aide Carter Page.

They attacked Republican Sen. Richard Burr, the chairman of the Senate Intelligence Committee, which just served Donald Trump Jr. with a subpoena.

They accused the FBI, without evidence, of illegally "spying" on the Trump campaign during the 2016 election.

They attacked House Democrats, like House Judiciary Committee Chairman Jerry Nadler, for investigating the president and trying to obtain the unredacted Mueller report.

The tweetstorm offers a window into how the Russia investigation and congressional probes stemming from it are very much front and center in the president's mind.

Trump also retweeted several users discussing the Justice Department inspector general's internal investigation into the FBI's handling of the Russia investigation and whether it followed the appropriate guidelines when seeking the Page FISA warrant.