Sen. Lindsey Graham stated Monday that he had tested positive for COVID-19.He tweeted, "I feel like a sinus infection and I am experiencing mild symptoms."Senator from the Republic of Republian has been vaccinated for the coronavirus.10 Things in Politics: Keep up to date with the most recent political and economic news. Loading Something is loading. Click Sign up to receive marketing emails and other offers from Insider.South Carolina Republican Senator Lindsey Graham announced Monday via Twitter that he had tested positive for COVID-19.According to the congressional lawmaker, he had "flu-like symptoms" Saturday and went to the doctor Monday.He tweeted, "I was just told by the House doctor that I tested positive for #COVID19 despite being vaccinated." "I began experiencing flu-like symptoms on Saturday night, and I went to the doctor this morning."Senator McCain, a Republican, said that he was glad to have received the coronavirus vaccination and that he will now be quarantined.He said, "I feel like a sinus infection. At the moment I have mild symptoms." "I will be in quarantine for ten days. I'm glad I got vaccinated. Without vaccination, I doubt I would feel the same way. I would have much worse symptoms.Graham received his COVID-19 shot shortly after the Food and Drug Administration approved two vaccines, Moderna and Pfizer for emergency use in the United States.He shared the moment via Twitter, writing: "Thank God that these vaccines were produced." We will return to normal if enough people take it.Insider was told by Graham's spokesperson that he received the Pfizer vaccine.Graham was seen at the Capitol recently without wearing a mask. Public health guidelines state that vaccinated individuals do not need to cover their faces in areas with low transmission. According to a CNN poll, at least 92% are vaccinated.Unlike the House, the Senate does not require staffers and members of Congress to wear masks.As the nation fights the highly contagious Delta variant, Coronavirus cases are on the rise in the US. According to the Centers for Disease Control and Prevention, the majority of new infections are caused by unvaccinated individuals.The CDC stated that although there are no guarantees of a 100% effectiveness, it is possible to have cases of coronavirus among vaccinated people. According to the CDC, however, there is evidence that the vaccine is very effective in preventing severe illness and hospitalizations, as well as death, from coronavirus.Jen Psaki, White House Press Secretary, stated Monday during a briefing that breakthrough cases are rare and mild.Psaki stated to reporters that they hoped Senator Graham would make a quick recovery.