President Trump reminded reporters on Thursday morning that the "big story" they should be covering is the "unmasking and surveillance" of people that occurred during the Obama administration.

"The big story is the 'unmasking and surveillance' of people that took place during the Obama Administration," Trump tweeted.

The president didn't elaborate further, but seemed to be referencing a Wall Street Journal article published Wednesday that revealed the House Intelligence Committee issued seven subpoenas related to its investigation into Russia's interference in the 2016 election and the Obama administration's monitoring of Americans.

Four of the subpoenas were related to the investigation into Russia's meddling in the election, and issued to President Trump's former national security adviser Mike Flynn, who was fired in February, and Michael Cohen, Trump's personal lawyer.

The remaining three were connected to reports that members of Trump's campaign team were identified in foreign surveillance reports and subsequently had their names "unmasked," the Wall Street Journal reported.

The Obama administration allegedly monitored people connected with the Trump campaign, and the House Intelligence Committee is seeking "information on requests" for the unmasking of names made by former national security adviser Susan Rice, former CIA Director John Brennan and Obama's ambassador to the United Nations Samantha Power.