A key Democrat says Republican Rep. Justin Amash’s accusation that President Donald Trump engaged in “impeachable conduct” in the Russia investigation isn’t enough to count as bipartisan support to launch impeachment proceedings.

But House Intelligence Committee Chairman Adam Schiff nevertheless is warning that Democrats remain on that potential path to force White House cooperation with the various congressional investigations into Trump’s conduct.

He tells CBS’ “Face the Nation” that impeachment proceedings are an “additional tool” to get information, along with subpoenas.

Amash on Saturday became the first member of Trump’s party on Capitol Hill to accuse him of engaging in “impeachable conduct” stemming from special counsel Robert Mueller’s investigation into Russian meddling in the 2016 election.

Still, Schiff said it remained unlikely that an impeachment trial would succeed in the Republican-controlled Senate.