Journalists need to understand what Trump is doing and refuse to play by his rules. He is going to use the respect and deference typically accorded to the presidency as an instrument for spreading more lies. Reporters must refuse to treat him like a normal president and refuse to bestow any unearned legitimacy on his administration.
Trump’s proxies need to be asked over and over again to provide evidence. When they are unable, they need to be asked why they are unable to defend the president’s assertion and if they believe what the president said. You can not play he said she said here.