Washington: The Trump campaign on Wednesday lashed out at Facebook after company executives said they were considering changes to rules around political ads that could affect the campaign's ability to target its supporters on the platform.

Angst about Facebook: US President Donald Trump speaks at a campaign rally. Credit:AP

The outcry came as Trump's reelection team has undertaken a massive spending blitz on Facebook aimed at countering the House's impeachment inquiry. Trump's page alone promoted more than $US830,000 ($1.2 million) worth of ads in the seven days ending on November 17, according to Facebook's ad archive.

Facebook's microtargeting technologies allow advertisers to home in on specific groups of users and deliver messaging tailored to them - a strategy the Trump campaign has used prolifically. Trump's campaign director Brad Parscale has noted that the president's team has tested thousands of variations of political ads in an attempt to reach small groups of voters, such as "15 people in the Florida Panhandle that I would never buy a TV commercial for."

The prospect that his reelection campaign could lose access to some of those tools appears to be vexing his team. The campaign's official Twitter account used siren emojis to sound the alarm, tagging Facebook's account on Twitter as it warned that the company "wants to take important tools away from us for 2020."