“I think the president’s admission this week that he would take help from a foreign government going forward is all you need to know about the importance of impeachment and that impeachment beginning now,” O’Rourke said during an interview on CNN’s “State of the Union.”

O’Rourke’s call comes after another Democratic candidate, Minnesota Sen. Amy Klobuchar, said she would support impeachment proceedings against Trump.

Klobuchar added that “it’s illegal” to take something of value from a foreign country to use in a campaign. She said Trump is “sending out signals” like he did in 2016, when he publicly urged Russia to find and publish Hillary Clinton’s emails.