"Based on this communication, it appears that multiple emails exist between Secretary Clinton and President Obama. Given that DOJ acknowledged that they 'are not in a position' to produce emails to the Committee that contain 'equities of other executive branch entities,' I ask that, pursuant to the Presidential Records Act, you please provide all email communications," Johnson wrote in the letter.

Johnson isn't the first GOP lawmaker to ask about the emails.

Republicans, during an interview with former FBI Director James Comey in 2018 , asked about the same Strzok text message and if Comey was aware of emails between Obama and Clinton.

"I remember for sure being aware that there were communications between them and sort of the general substance of it is. I have some vague recollection of having seen them myself. I'm not certain of that, though, but I was aware that there were communications between the two of them," he told House Republicans.