I know we shouldn’t pay too much attention to the early vote and this might not mean anything. But if it holds up it’s big. Old people vote: Donald Trump is lagging Kamala Harris in Pennsylvania early voting with a critical and once-reliably Republican constituency: seniors. It’s a warning sign for the former president that reflects early vote data and polling across the battlegrounds, after Republicans won the senior vote in each of the last five presidential elections. In Pennsylvania, where voters over the age of 65 have cast nearly half of the early ballots, registered Democrats account for about 58 percent of votes cast by seniors, compared to 35 percent for Republicans. That’s despite both parties having roughly equal numbers of registered voters aged 65 and older. The partisan gap is narrower than it was in 2020, when views of early voting were more partisan, and Republicans take that as a good sign. But the GOP still is counting on more of its older voters to show up on Election Day, while Democrats have more votes in the bank. The data is in line with polling in the state that has shown Trump shedding support among older voters. According to a Fox News poll of Pennsylvania, Trump is running 5 percentage points behind Harris among voters ages 65 and over, slipping back from the previous month, when he and Harris were tied with that demographic. It’s a major shift from 2020, when Trump carried 53 percent of the senior vote in Pennsylvania in a…