Capping off a Sunday morning tweetstorm about the Mueller investigation, President Trump alleged that its expanding scope is designed to "put some hurt on the Republican Party" during this fall's midterm elections.

The big picture: Trump is referencing yesterday's New York Times story that detailed how his son, Donald Trump Jr., heard suggestions from an emissary that the Saudis and Emiratis both wanted to help the Trump campaign in the 2016 election.

The rest of Trump's tweets, which hit out at the "long & boring" Times story and returned to some of his favorite attack lines — Hillary Clinton's emails, the DNC's server, and Andrew McCabe:

Go deeper: Axios' Mike Allen takes a deep dive on Donald Trump Jr. under Mueller's microscope.