None of the major ones do, or at least not that I've seen in recent years (and I rent 3-4 times every month).
You might find a "Rent-A-Wreck" type place that does, but still not likely. A car with a manual transmission in the US limits the number of customers they can rent it to, so most places are going to avoid them.
you can arrange a specialty rental through a lot of companies, often times you see exotics that are manuals for rentals. i wouldn't hold out for a normal rental car from a company like avis, enterprise, national, etc.
The only "normal" rental I've seen in years with a manual was a base Ranger.
Now? Probably none in the US unless you go with a specialty rental company.
And what incentive does a rental company have to offer a manual?
The savings on the front end is not enough to offset the potential clutch replacement cost liability.
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Few people understand the psychology of dealing with a highway traffic cop. A normal speeder will panic and immediately pull over to the side. This is wrong. It arouses contempt in the cop heart. Make the bastard chase you. He will follow.