Former President Donald Trump arrives to speak to his supporters during the Save America Rally in Sarasota. 

Former President Donald Trump helped raise more than $56 million from online donors during the first six months of this year, a campaign finance disclosure showed on Friday in a sign of Trump's power within the Republican Party.

The "Trump Make America Great Again Committee," which raises money for the Republican Party and for fundraising groups controlled by Trump, brought in more than $34 million during the period, according to a report filed by Winred, the dominant online fundraising platform for Republicans.

Additionally, Trump's own fundraising committees, together with another group that raises money exclusively for them, raised more than $22 million through Winred.

Most of the money came through donations of less than $50, and the combined haul shows Trump maintains a powerful sway over the party's rank-and-file even after his turbulent four-year term ended in January.