Sen. Markwayne Mullin (R-Okla.), who challenged a Teamsters boss to a fight last month, on Thursday slammed Rep. Matt Gaetz (R-Fla.) for “living off” his “daddy’s money” after Gaetz cited Mullin’s increase in wealth as a reason to ban members of Congress from trading stocks. “I hear @RepMattGaetz has criticism of hard-earned success — he…