I agree with Mitchell on this one:

"That tweet by Grassley about "playing 2nd trombone" to Schumer was just too OTT by half. Was he trying to bait the Dems into thinking they have us on the ropes and overplaying their hand? Like saying, "My cards always suck!," when holding a full house trying to build the pot?"

https://twitter.com/mitchellvii/status/1043663647241834496