I believe it's a replica of the Andrew Jackson statue located outside the White House. President Trump was a fan of Jackson and had his presidential portrait, as well as the horseback replica statue, in the oval office.

During Andrew Jackson’s presidential term he decided that the National Bank must go. He decided that it did not warrant reform but rather needed to be destroyed. In 1832, a Renewal Bill for the United States Bank came to the President. Jackson chose to veto the Bill for the Bank, and the address that he included with the veto stated his clear reasoning for why he vetoed the bank. Jackson’s reasons for vetoing the bill were an amalgamation of his views that the bank was unconstitutional, a monopoly for the rich, and exposed the government to control of foreign interest.

Edit: Photo of Trump in Oval Office with Jackson portrait upper right, and Jackson sculpture lower left.

I believe it's a replica of the Andrew Jackson statue located outside the White House. President Trump was a fan of Jackson and had his presidential portrait, as well as the horseback replica statue, in the oval office.

During Andrew Jackson’s presidential term he decided that the National Bank must go. He decided that it did not warrant reform but rather needed to be destroyed. In 1832, a Renewal Bill for the United States Bank came to the President. Jackson chose to veto the Bill for the Bank, and the address that he included with the veto stated his clear reasoning for why he vetoed the bank. Jackson’s reasons for vetoing the bill were an amalgamation of his views that the bank was unconstitutional, a monopoly for the rich, and exposed the government to control of foreign interest.