Answer:
A radical republican in Congress would likely have argued that Lincoln's proclamation did not go far enough. They would have likely argued that all slaves in the Confederacy should be immediately freed and provided citizenship rights, as slavery had not been explicitly abolished in the declaration. They would have argued that such a declaration should have been made sooner, rather than allowing slavery to continue as long as it had. They would have also argued that the proclamation should be extended to all states as well, rather than just the Confederate states.
Step-by-step explanation: