The humorist Will Rogers ran a mock campaign for the presidency in 1928 that got so much attention, and was so favorably received, that some Democrats proposed him as a serious contender in 1932. Rogers politely pulled himself out of the running—with an observation that “Politics has got so expensive that it takes lots of money to even get beat with.” On a more personal and professional note, Rogers warned that “A comedian can only last till he either takes himself serious or his audience takes him serious.” That is the only argument I can think of for not asking Jon Stewart to moderate at least one of the 2016 presidential debates. And this argument fails because both comedy and politics have changed sufficiently over the past 80-plus years to justify the risk to the reputation of the recently retired Daily Show host. So it should come as no surprise that so many Americans have signed on to a new petition drive at change.org, which declares that: “Over the last 16 years, Jon Stewart has played an influential and iconic role in covering US politics and media. We believe he should continue that tradition as a moderator at one of…