“[Frenchmen] are not the sort of people one would go tiger-shooting with.”

Source: The Tejano Conflict (2014), Chapter 28

How to Build a Fortune (2006), Trump University audiobook, quoted in * 2016-05-19 Jeremy Diamond Donald Trump in 2006: I 'sort of hope' real estate market tanks CNN https://www.cnn.com/2016/05/19/politics/donald-trump-2006-hopes-real-estate-market-crashes/index.html
2000s

Letter to Bess Wallace (8 September 1918) https://www.trumanlibrary.org/whistlestop/study_collections/ww1/documents/fulltext.php?documentid=1-15
Context: Now days battles are just sort of a "You shoot up my town and I'll shoot up yours." They say that Americans don't play fair. They shoot 'em up all the time. I hope so because I want to finish this job as soon as possible and begin making an honest living again... Have fired 500 rounds at the Germans, at my command, been shelled, didn't run away thank the Lord and never lost a man. Probably shouldn't have told you but you'll not worry any more if you know I'm in it than if you think I am. Have had the most strenuous work of my life, am very tired but otherwise absolutely in good condition physically mentally and morally... When a High Explosive shell bursts in fifteen feet and does you no damage, you can bet your sweet life you bear a charmed life and no mistake. I didn't have sense enough to know what was going on until the next day and then I was pretty scared. The men think I am not much afraid of shells but they don't know. I was too scared to run and that is pretty scared.

Singing to supporters at ANC celebrations in Bloemfontein on 8 January 2012, Is Jan van Riebeeck really the cause of all SA's misfortunes? http://www.politicsweb.co.za/news-and-analysis/is-jan-van-riebeeck-really-the-cause-of-all-sas-mi, Dave Steward (16 January 2015)
Jacob Zuma sings kill the Boer https://www.youtube.com/watch?v=Cb3MLHblnbQ, youtube

Watts, J. 2005, 'Chinese activist vows to continue, despite beating' http://www.guardian.co.uk/world/2005/oct/12/china.jonathanwatts, The Guardian, 12 October.

2010s, 2010
Context: Just because you in Washington and you who are so out of touch with life in the media, just because you don't believe in anything doesn't mean nobody else does. We do. You know why you're confused by this show? It's because I believe in something. You don't.
Tea parties believe in small government. We believe in returning to the principles of our founding fathers. We respect them, we revere them. Shoot me in the head before I stop talking about the founders. Shoot me in the head if you try to change our government — I will stand against you. And so will millions of others. We believe in something. You in the media and most in Washington don't. The radicals that you and Washington have co-opted and brought in wearing sheep's clothing — change the pose. You will get the ends. You've been using them? They believe in Communism. They believe and have called for revolutionar — a revolution. You're going to have to shoot them in the head. But warning: they may shoot you.
They are dangerous because they believe. Karl Marx is their George Washington. You will never change their mind. And if they feel you have lied to them — they're revolutionaries. Nancy Pelosi, those are the people you should be worried about.
Here is my advice when you're dealing with people who believe in something that strongly — you take them seriously. You listen to their words and you believe that they will follow up with what they say.

Letter to Sylvia Payne (24 April 1906), from The Collected Letters of Katherine Mansfield (1984-1996), vol. I

Attributed to "an American President" in Ármin Vámbéry (1884), All the Year Round. It more likely originates in a spoof testimonial that Artemus Ward (Charles Farrar Browne) wrote in an advertisement in 1863:
Posthumous attributions

Source: Simply Irresistible