The phrase "political heavyweights" refers to people who are influential and powerful in the world of politics. They are typically experienced, well-known, and have a significant impact on government and public affairs. Full definition
I have seen Imam Feisal speak a dozen times, from largely Muslim audiences in London, to largely Christian audiences in upstate New York, from an audience of grassroots interfaith leaders in Louisville, to an audience of political heavyweights in Washington. (religion.blogs.cnn.com)
Tillemann comes from a long line of political heavyweights in Colorado and moved back to the state to run. (theintercept.com)
WASHINGTON — President Obama yesterday met with a group of political heavyweights who back immigration reform — including Mayor Bloomberg and Police Commissioner Ray Kelly — to assure them he... (pagesix.com)