A Texas representative has introduced an article of impeachment against President Donald Trump for obstruction of justice.

Brad Sherman (D-Calif.) and Al Green (D-Texas) are co-sponsoring the article. Sherman announced the article in a press conference Wednesday afternoon. In it, he accuses Trump of obstructing investigations into Russian meddling in the 2016 presidential election, in part by firing former FBI Director James Comey.

In a press release, Sherman points to the recent disclosures by Donald Trump Jr. that,"indicate that Trump’s campaign was eager to receive assistance from Russia."

"As the investigations move forward, additional evidence supporting additional Articles of Impeachment may emerge. However, as to Obstruction of Justice, as defined in 18 U.S.C. § 1512 (b)(3), the evidence we have is sufficient to move forward now. And the national interest requires that we do so."

Sherman acknowledges that filing the article is "the first step on a very long road."