As voters flooded polling places across the country on Election Day, some reported problems such as broken machines, long lines and voter intimidation in states ranging from Texas to Pennsylvania. While voting appeared to proceed without headaches in many locations, election observers said they expect a significant increase in the number of issues reported nationwide compared to earlier presidential elections. In particular, voters in a handful of jurisdictions across the country encountered problems with malfunctioning voting machines, highlighting issues with the aging infrastructure expected to support tens of millions of voters turning out on Election Day. One major with some technological problems was Durham County, N.C., which has more than a quarter-million residents outside Raleigh. Officials there had technical issues with electronic poll books used to check in voters. As a result, state authorities told Durham officials to use paper poll books, rather than electronic ones, eventually leading to some delays. (Durham was already using paper ballots.) Local officials asked the North Carolina State Board of Elections to extend voting hours in some precincts, a request that was echoed by Hillary Clinton’s campaign manager. On Tuesday evening, state officials agreed to extend voting in eight precincts, pushing back the closing of polls by as much as an hour in some Durham locations and by 30 minutes in Columbus County. A group had also filed a lawsuit Tuesday afternoon seeking to keep the Durham polls open until 9 p.m.