Some indirect sideswipes...
Trump also indirectly encouraged Sen. Susan Collins of Maine to vote for the Obamacare repeal bills. She did not do so in the end.
Additionally, Trump has attacked the Senate Intelligence Committee, chaired by GOP Sen. Richard Burr, but did not name the lawmaker by name.
On a broader level, Trump has implored Republican senators to do away with the legislative filibuster in order to pass legislation and avoid electoral failure. However, this may also be a veiled attack on Senate Majority Leader Mitch McConnell.
Jeff Flake (Arizona)
Number of negative Twitter mentions: 2
Key tweet: "Great to see that Dr. Kelli Ward is running against Flake Jeff Flake, who is WEAK on borders, crime and a non-factor in Senate. He's toxic!" on August 17, 2017.
Reason for tweets: Criticizing Trump's demeanor in his book.
Bob Corker (Tennessee)
Number of negative Twitter mentions: 4
Key tweet: "Bob Corker gave us the Iran Deal, & that's about it. We need HealthCare, we need Tax Cuts/Reform, we need people that can get the job done!" on October 8, 2017.
Reason for tweets: Criticizing Trump's response to the violence in Charlottesville, suggesting Trump is dangerous to the security of the country.
Rand Paul (Kentucky)
Number of negative Twitter mentions: 4
Key tweet: "Rand Paul, or whoever votes against Hcare Bill, will forever (future political campaigns) be known as 'the Republican who saved ObamaCare.'" on September 22, 2017.
Reason for tweets: Coming out against multiple GOP Obamacare repeal and replace plans.
Lisa Murkowski (Alaska)
Number of negative Twitter mentions: 1
Key tweet: "Senator @lisamurkowski of the Great State of Alaska really let the Republicans, and our country, down yesterday. Too bad!" on July 26, 2017.
Reason for tweets: Voting against the GOP Obamacare repeal and replace bill.
Lindsey Graham (South Carolina)
Number of negative Twitter mentions: 2
Key tweet: "Publicity seeking Lindsey Graham falsely stated that I said there is moral equivalency between the KKK, neo-Nazis & white supremacists and people like Ms. Heyer. Such a disgusting lie. He just can't forget his election trouncing.The people of South Carolina will remember!" on August 17, 2017.
Reason for tweets: Pushback on travel ban, criticizing Trump's response to the violence in Charlottesville, Virginia.
John McCain (Arizona)
Number of negative Twitter mentions: 8
Key tweet: "John McCain never had any intention of voting for this Bill, which his Governor loves. He campaigned on Repeal & Replace. Let Arizona down! " on September 23, 2017.
Reason for tweets: McCain came out against multiple Obamacare repeal bills, pushed back on Trump's travel ban order.
Mitch McConnell (Kentucky)
Number of negative Twitter mentions: 7
Key tweet: "Can you believe that Mitch McConnell, who has screamed Repeal & Replace for 7 years, couldn't get it done. Must Repeal & Replace ObamaCare!" on August 10, 2017.
Reason for tweets: Failure to repeal and replace Obamacare, saying Trump has "excessive expectations" for the Senate, debt ceiling negotiations, not repealing the legislative filibuster.
Source: Business Insider India