TRANSLATION — Joke maps of the MBTA, like this one that has been making its way around Twitter this week, might elicit some frustrated chuckles now. But as delays get worse and patience runs out, politicians are scrambling to make sure they aren’t blamed for the T’s performance this winter. First and foremost is Governor Charlie Baker. On Wednesday he demanded that Keolis, the French company that operates the commuter rail, shape up in time for Monday, when school vacation ends. He took a similarly strong tone with transit officials last week. It’s clear the MBTA has become a political hot potato, and Baker doesn’t want to be left holding it.