Ken Starr: It's grounds for impeachment if Trump lied about trying to fire Mueller

Ken Starr, who used Bill Clinton’s false statements about his relationship with Monica Lewinsky as grounds for impeachment, told ABC’s This Week: “Lying to the American people is a serious issue that has to be explored. I take lying to the American people very, very seriously, so absolutely.”

Starr said: “That is something Bob Mueller should look at.”