HARRISBURG, Pa. (AP) — The first Democratic presidential candidates are filing voter signatures to get on Pennsylvania’s primary ballot, according to information from the state election office Friday. The first to file was California billionaire Tom Steyer, submitting signatures on Thursday. On Friday, former South Bend, Indiana, Mayor Pete Buttigieg, Minnesota Sen. Amy Klobuchar, Massachusetts Sen. Elizabeth Warren and former New York Mayor Mike Bloomberg also filed. The other campaigns have through 5 p.m. Tuesday to file 2,000 signatures of voters who are registered Democrats to get on Pennsylvania’s April 28 primary ballot. Pennsylvania is a late primary state but could be important if the eventual nominee remains in doubt past March, since Pennsylvania has the sixth-most delegates in the Democratic primary. President Donald Trump’s campaign also filed his paperwork Friday to get on the Republican primary ballot.