Really? Because I believe it was a Republican who shot a leftist in Seattle on J20. Pretty sure it was a white supremacist who stabbed three people in Portland. And for the republicans shot at their softball practice, they kinda had it coming. One of them has repeatedly been open with his affiliations with white supremacists, and has been doing everything he can to take away people's healthcare while making his own government provided health coverage even better. Besides, that shooter was a liberal, not a leftist. Any violence you're seeing from the actual left is in direct response to right wing violence and state repression.