VPNs under US jurisdiction can pose potential threats depending on their privacy practices. With legislation like the Patriot Act, the US government has significant surveillance power over its citizens.
If you choose a VPN based in the US, you’ll want to find one with a proven no-logs policy to ensure that your personal browsing data is secure. If it’s not, this can leave you exposed in the event of a court order. At any point, a US VPN is obligated to cooperate with US government officials if they request customer data pertaining to a case.