Sen. Ron Johnson (R-Wis.) is grinding the gears of the Senate to a halt as it seeks to move forward with President Biden’s $1.9 trillion COVID-19 relief bill. It is just the latest step by Johnson, who is up for reelection in a state narrowly won by Biden, to burnish his Trump credentials, whether that’s by repeating unfounded theories about the Jan. 6 attack or becoming the face of GOP opposition to the coronavirus bill that is broadly popular even among Republicans. Johnson is taking a two-pronged approach to his hardball tactics: First, he’s forcing the Senate clerks to read...