Friends, I will disown and repudiate any man of my party who attacks with such foul slander and abuse any opponent of any other party; and now I wish to say seriously to all the daily newspapers, to the Republicans, the Democrat, and Socialist parties, that they cannot, month in month out and year in and year out, make the kind of untruthful, of bitter assault that they have made and not expect that brutal, violent natures, or brutal and violent characters, especially when the brutality is accompanied by a not very strong mind; they cannot expect that such natures will be unaffected by it.

Theodore Roosevelt (1858-1919) American politician, statesman, conservationist, writer, US President (1901-1909)

Speech, Milwaukee (14 Oct 1912)
    (Source)

On the newspaper attacks which he said had just led to the attempt on his life.