Answer:
Lack of power to enforce taxation
Explanation:
The Articles of Confederation couldn't collect money from the states, they could only ask nicely. When the only state that ended up paying taxes was Virginia, Congress was basically broke. They couldn't pay soldiers and had a hard time keeping up with the war.
"... the chief business of the American people is business." he once said.
Coolidge followed a laissez-faire economic policy, whereby the government doesn't interfere in the national economy unless absolutely necessary, and even then its actions should be limited to gentle nudges to get the economy back on track rather than large scale intervention.
So, Coolidge's attitude toward business was 'if it's not broken, don't fix it' - leave business alone to prosper.
Spent 4 hours every day writing stories from his garden shed.
I believe they were both harmed by nuclear radiation. Hiroshima was when the USA bombed Japan with a nuclear bomb. Chernobyl is the disaster in which a reactor caught fire and caused the harmful radiation to spread. I hope that was helpful. :)