PHILADELPHIA -

The Democratic candidates for Pennsylvania governor are concentrating on vote-rich Philadelphia on their last full day of the primary election campaign.

All four candidates are scheduled to spend some or all of Monday meeting voters at train stations, businesses and shopping malls.

Front-runner Tom Wolf appeared in Lancaster before heading to Philadelphia to meet commuters at Suburban Station.

U.S. Rep. Allyson Schwartz, state Treasurer Rob McCord and former state environmental protection secretary Katie McGinty all planned to spend the day campaigning in the state's largest city, where one in five Pennsylvania Democrats lives.

McCord also is staging a get-out-the-vote event in Montgomery County on Monday evening.

The primary election is Tuesday. Polls open at 7 a.m. and close at 8 p.m. About one in four of Pennsylvania's 4.1 million Democrats is expected to vote.