Mike Johnson: Doing 'the right thing' may cost the speaker his gavel

CNN — It took less than six months for Speaker Mike Johnson to reach his existential moment. The Louisiana Republican has arrived at fateful but familiar crossroads where he must either choose to honor a conventional vision of US national interests or side with the wrecking ball antics of his party's far-right bloc. It's a choice with which his immediate predecessors - Kevin McCarthy, Paul Ryan and John Boehner - wrestled before him. Their refusal to lead the US into debt or financial crises or to compromise America's global role ended up driving them into political oblivion. Now, as Johnson…