From the May 29, 1865 issue of The Chicago Times. (at the Library of Congress):
The legislature of Connecticut, now in session, has before it a proposition to amend the state constitution so as to give the right of voting to colored persons. It will probably pass without much opposition, as the only remaining step in the march of progress of the republican party.
You can read a July 7, 1865 clipping at University of Detroit Mercy that said Copperheads were going to battle against the proposed amendment. It compared Connecticut and New Hampshire to North and South Carolina, but praised New Hampshire’s indomitable John Parker Hale