The first statement are the arbitrary arrests for dissenting views numbered in the thousands during the war, and they also included the opposition of newspaper editors, to add the Democratic politicians had a paper also here, and simple ordinary civilians were a huge part.
The second statement is that The Constitution was murky on addressing who used to held the power to suspend the writ of habeas corpus, and Lincoln claimed that right under the presidential war powers and suspended it twice for those who were accused of "disloyal activities." with the country, citizens and president.
