What was one of the Hartford convention

The Hartford Convention was a series of meetings from December 15, 1814 to January 5, 1815, in Hartford, Connecticut, United States, in which the New England Federalist Party met to discuss their grievances concerning the ongoing War of 1812 and the political problems arising from the federal government's increasing

Explanation:

At the Hartford Convention, Federalists agreed to oppose the war and send delegates to meet with Congress.

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After Civil War, President Andrew Johnson clashed repeatedly with the Republicans at the Congress, over reconstruction of the South.   Johnson vetoed legislation that Congress passed to protect the rights of those freed from slavery, and every opportunity, he tried to block actions by the Republicans. Johnson also vetoed the Freedmen's Bureau bill in February of 1866. His enemies were repeatedly promoting his impeachment, until he left office as american President on March 4, 1869.