For Florida Sen. Marco Rubio, it's the equivalent of a two-fer.
First, Rubio enthusiastically signed a letter organized by Arkansas Senator Tom Cotton, warning Iran's leaders that any nuclear deal with the Obama administration could be undone by Congress or the next president.
Now, after widespread criticism of the letter, Rubio's Reclaim America PAC has rushed out a fundraising appeal citing the need to "respond to the outrageous attacks on Tom Cotton and Marco Rubio."
As "one of the first senators" to sign Cotton's letter, Rubio is able to boast that he added his name before the current and former governors who are preparing presidential campaigns (the day after the letter was sent to Tehran, Bobby Jindal, Jeb Bush, Rick Santorum, and Rick Perry all signaled their support for it). He's also savvy enough to spot a fundraising opportunity when it presents itself, although it is unclear how the PAC plans to spend the donations made to respond to the political blowback.
While Vice President Joe Biden offered perhaps the most impassioned attack on Cotton's letter, he refrained from naming Cotton or Rubio, or any of the signers. Cotton did appear alongside Senate Majority Leader Mitch McConnell, Texas Sen. Ted Cruz and Kentucky Sen. Rand Paul on the New York Daily News' now famous "traitors" cover, but there was no sign of Rubio.