President Trump retweeted Fox News articles early Friday that focused on Senate Majority Leader Mitch McConnell Addison (Mitch) Mitchell McConnellMomentum growing among Republicans for Supreme Court vote before Election Day Trump expects to nominate woman to replace Ginsburg next week Video of Lindsey Graham arguing against nominating a Supreme Court justice in an election year goes viral MORE (R-Ky.), along with Sens. Dean Heller Dean Arthur HellerOn The Trail: Democrats plan to hammer Trump on Social Security, Medicare Lobbying World Democrats spend big to put Senate in play MORE (R-Nev.) and Jeff Flake Jeffrey (Jeff) Lane FlakeJeff Flake: Republicans 'should hold the same position' on SCOTUS vacancy as 2016 Republican former Michigan governor says he's voting for Biden Maybe they just don't like cowboys: The president is successful, some just don't like his style MORE (R-Ariz.).

The retweeted article on McConnell, dubbed "Trump fires new warning shot at McConnell, leaves door open on whether he should step down," highlights the president's recent attacks on the Senate majority leader.

Trump fires new warning shot at McConnell, leaves door open on whether he should step down https://t.co/tJIRc0usWl — FOX & friends (@foxandfriends) August 11, 2017

Trump has blamed McConnell for failing to fulfill a seven-year Republican campaign promise to repeal and replace ObamaCare.

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The president threatened McConnell on Thursday saying, "If he doesn’t get repeal and replace done, and if he doesn’t get taxes done — meaning cuts and reform, and if he doesn’t get a very easy one to get done — infrastructure — if he doesn’t get them done, then you can ask me that question."

Trump also retweeted an article focused on Flake and Heller, who both face pro-Trump primary challengers.

Senators learn the hard way about the fallout from turning on Trump https://t.co/wq8Im1cHpy — FOX & friends (@foxandfriends) August 11, 2017

The piece singles out Heller for his "tepid" support of Republican repeal and replace efforts and of Trump's presidential campaign, along with Flake's recent promotion of his new book "Conscience of a Conservative: A Rejection of Destructive Politics and a Return to Principle," which is critical of the rise of Trump.

Speculation has grown that Trump will back primary challengers in Arizona and Nevada.