In this case, it’s a smart and not at all risky move.
In terms of domestic politics, Graham’s a reed in the currents. He’ll flip-flop all over the damned place on anything. On foreign policy… he’ll shut up sometimes… but he’s a hawk. He’s always been a hawk, he’ll always be a hawk. I give him a little more credit than the typical GOP chickenhawk because he did serve in uniform, and remained active in the reserves until mandatory retirement at 60 in 2015 (and did so without pay from 1995 on, because you can’t draw pay from 2 different branches of the federal government, and he was sworn into Congress in '95)… but only a very little more, because as military service goes, USAF JAG Corps… I mean…
But yeah, Graham’s a hawk, and having Medvedev threaten him with assassination… jeez, talk about Russia getting played. Not only is that kind of ‘threatening to assassinate a high-profile US Senator’ exactly what Zelenskyy wanted out of that, but it’s exactly what Graham wanted, too. I bet he’s giddy AF over the Russians treating him like an international badass. Especially with that line about ‘I’ll go to the Hague if you will’. He’s in no real danger, and he can posture and trash talk freely now.