Hillary Clinton is hoping to extend a Democratic winning streak in Pennsylvania. | Getty Clinton considers expanding ad campaign to Pennsylvania

Hillary Clinton's campaign has inquired about expanding its television-advertising campaign to Pennsylvania — another indication the state's 20 electoral votes are up for grabs this fall despite Democrats' six-election winning streak there.

Pennsylvania wasn't among the eight states where the Clinton campaign launched its first general-election advertisements earlier this month, nor was it part of the pro-Clinton super PAC Priorities USA Action's initial ad buys. But Priorities recently reversed course and began placing ads that are set to begin airing next week.

The Clinton camp isn't up in Pennsylvania just yet. But, in the process of launching an eight-state, $135,000 addressable campaign on satellite systems for the two weeks leading up to the Democratic convention in Philadelphia, the campaign has asked satellite to locate potential target households in Pennsylvania. The eight states making up the buy on Dish Network and DirecTV are the same eight from the original Clinton buy: Colorado, Florida, Iowa, Nevada, New Hampshire, North Carolina, Ohio and Virginia.

The addressable satellite ads are much more targeted than the campaign's broadcast campaigns. Both companies use demographic data to allow advertisers to reach targeted households, rather than spending to reach all viewers of a specific program.

While Pennsylvania isn't part of Clinton's initial ad buys, the presumptive Democratic nominee has campaigned in the state since pivoting to the general election campaign. Donald Trump delivered a speech on economic issues in the Pittsburgh suburbs on Tuesday.

Clinton leads Donald Trump in Pennsylvania, according to POLITICO's Battleground polling average, 46 percent to 39 percent, though some polls show the candidates neck-and-neck there.