President Trump Donald John TrumpBiden on Trump's refusal to commit to peaceful transfer of power: 'What country are we in?' Romney: 'Unthinkable and unacceptable' to not commit to peaceful transition of power Two Louisville police officers shot amid Breonna Taylor grand jury protests MORE accused congressional Republicans on Saturday of being played "like a fiddle" by Democrats on immigration reform and border security.

Trump also issued another call for his signature campaign promise of a building wall along the U.S.-Mexico border.

In a tweet, the president slammed Democrats for their immigration proposals, which he likened to "open borders" while accusing "Republican leadership" of going along with the minority party.

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"When will Republican leadership learn that they are being played like a fiddle by the Democrats on Border Security and Building the Wall? Without Borders, we don’t have a country. With Open Borders, which the Democrats want, we have nothing but crime! Finish the Wall!" he wrote.

When will Republican leadership learn that they are being played like a fiddle by the Democrats on Border Security and Building the Wall? Without Borders, we don’t have a country. With Open Borders, which the Democrats want, we have nothing but crime! Finish the Wall! — Donald J. Trump (@realDonaldTrump) September 15, 2018

Trump's tweet comes amid months of inaction from Congress on immigration and border security.

Republicans and Democrats have been unable to pass a bill that would fund the president's demands for a wall along the border and increased security, while providing legal protections for immigrants who came to the U.S. illegally as children.

Earlier this year, the president directed hundreds of National Guard troops to the border to supplement Border Patrol forces.

In June, it was reported that those troops were performing menial tasks such as changing flat tires and shoveling manure from Border Patrol horses, as they were not permitted to assist with enforcement operations.

Brandon Judd, president of the National Border Patrol Council, a union that represents Border Patrol agents, at the time called the president's use of National Guard troops a "colossal waste of resources."