Answer:
they refused to trade with them
The South felt betrayed by Taylor because he pushed for the 1850 Compromise on slavery.
You might think it too high to say 90% ... but it really was 90% of funding for the Interstate Highway system that was provided by Congressional funding. This was a huge program signed into law during the presidency of Dwight Eisenhower. It was considered essential to the national interest. The Federal-Aid Highway Act passed in 1956 allocated $26 billion (in 1956 dollars!) to this monumental road-building effort.
Answer:
ended confederate operations in the north
