Trump is taking a road trip to Mexico to meet with Mexican President Enrique Peña Nieto. Josh Marshall explains why this is a bad idea:

It’s a general rule of politics not to enter into unpredictable situations or cede control of an event or happening to someone who wants to hurt you. President Nieto definitely does not want Donald Trump to become President. He probably assumes he won’t become president, simply by reading the polls. President Nieto is himself quite unpopular at the moment. But no one is more unpopular than Donald Trump. Trump is reviled. Toadying to Trump would be extremely bad politics; standing up to him, good politics.

Put those factors together and Peña Nieto has massive and overlapping reasons to want to embarrass Trump. At a minimum since he’s probably not eager to create a true international incident, he has zero interest in appearing in any way accommodating or helpful. The calculus might be different if Trump seemed likely to be the next US President. Mexico is a minor power with the world colossus on its doorstep. But a Trump presidency seems unlikely. Far likelier, Peña Nieto will need to build a relationship with Hillary Clinton. These factors combined make for an inherently dangerous political situation for Donald Trump, especially since the atmospherics of this meeting will be the backdrop for Trump’s evening speech which is itself an incredibly important moment and one in which he has set for himself what is likely an impossible challenge.

And here’s the punch line:

Trump is apparently traveling to Mexico with Rudy Giuliani and Sen. Jeff Sessions as his minders.

The Trump campaign has been one long exercise in shark-jumping, but this is epic even for Trump.