A pair of Democratic lawmakers are probing whether the National Rifle Association (NRA) violated campaign finance laws by coordinating communications with President Trump Donald John TrumpBubba Wallace to be driver of Michael Jordan, Denny Hamlin NASCAR team Graham: GOP will confirm Trump's Supreme Court nominee before the election Southwest Airlines, unions call for six-month extension of government aid MORE's 2016 campaign and other GOP campaigns.

Rep. Jamie Raskin Jamin (Jamie) Ben RaskinShakespeare Theatre Company goes virtual for 'Will on the Hill...or Won't They?' Trump payroll-tax deferral for federal workers sparks backlash Congress must enact a plan to keep government workers safe MORE (D-Md.) and Sen. Sheldon Whitehouse Sheldon WhitehouseHillicon Valley: Murky TikTok deal raises questions about China's role | Twitter investigating automated image previews over apparent algorithmic bias |House approves bill making hacking federal voting systems a crime House approves legislation making hacking voting systems a federal crime LWCF modernization: Restoring the promise MORE (D-R.I.) wrote in a letter to NRA CEO Wayne LaPierre that media companies the NRA reportedly used to purchase political ads were also employed by the Trump campaign and other Republicans.

"The relationship between the firms the NRA employed and the firms the Trump Campaign and other Republican candidates used suggests illegal coordination," they wrote in the letter dated Wednesday.

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The letter notes that "the NRA spent over $50 million on 'independent' expenditures" that supported Republican candidates, including Trump, during the 2016 election.

The Democratic lawmakers are requesting a series of documents from the NRA by March 6, including emails with five media consulting firms