Democrats, for example, have all but abandoned calls for defense cuts.
The number of abandoned calls, which means the caller hangs up before speaking to someone, rose 20 percent.
Ofcom regulations state abandoned calls must make up no more than 3% of all live calls in a 24-hour period, and all abandoned calls must carry a short recorded message identifying who it is from.
For silent and abandoned calls, caused by automated systems dropping calls as soon as one is answered, contact Ofcom.
In 2013, for instance, it fined TalkTalk £750,000 for an excessive number of silent and abandoned calls.
Ofcom also found some of Barclaycard's call centres had no procedures in place to prevent people receiving repeated abandoned calls over a short period of time.
In March high street bank Abbey was fined £30,000 for exceeding the permitted level of abandoned calls and last year Carphone Warehouse received a £35,000 penalty.
In March, high street bank Abbey was fined £30,000 for exceeding the permitted level of abandoned calls, while Carphone Warehouse was hit with a £35,000 penalty in January 2007.
But Barack Obama and John Kerry face mounting criticism that they have abandoned calls for a political transition in Damascus, avoiding the thorny issue of Bashar al-Assad's future.
Abandoned calls are not classified as nuisance calls but take up operators' time as the majority of them have to be called back to ensure the emergency services are not required, the Met said.
