One of the things that President Johnson did that stunned political backers after he took office was that he dramatically changed his views on Reconstruction, since he proved to be far more lenient on the South than he had implied he would be.
On July 10, 1919, the president of the United States, for the first time since 1789, personally delivered a treaty to the Senate. This was no ordinary treaty; it was the Treaty of Versailles, ending World War I and establishing the League of Nations. As Secret Service agents and Capitol Police officers sealed off the Senate wing to everyone without a special pass, President Woodrow Wilson walked into the chamber lugging the oversized document under his right arm. Recently returned from Paris and his unprecedented self-assigned role as leader of the American negotiating team, Wilson hoped for prompt Senate approval but feared trouble from Republicans, newly restored as the chamber's majority party.
Answer:
A terrible famine in Ireland.
Explanation:
The British were very unfriendly to any kind of Irish nationalism and they cracked down hard. Ireland was primarily reliant on potatoes, and there was a horrible famine. Millions starved, and the British did little to help.
Irish immigrants had a very low standing in America, and were persecuted.
There wasn't free land in the West for the Irish.
The Irish people were not necessarily skilled artisans or craftsmen. Many of them were farmers, peasant folk, or factory workers who bargained their way to America.