According to HotAir:

Romney has re-emerged, as he does occasionally, to be the self-appointed voice of morality. He slammed President Trump's behavior during the phone call to Ukraine's President Zelensky as "wrong and appalling".

…While Romney is clutching his pearls over Trump's phone call, I haven't seen a tweet criticizing Rep. Adam Schiff for lying about contact with the whistleblower who filed the complaint that opened up the investigation into the phone call. Even the Washington Post gave that four Pinocchios. That's the problem with Romney – he's too busy criticizing a Republican president to criticize Democrats. He was the first one out of the gate to jab at Trump on Twitter. Romney knew it would get a response.