With Memorial Day now in the rear view mirror, summer has unofficially kicked off which means Americans will increasingly travel on vacation. But a Florida congressman with a strong background on transportation and aviation issues released a report last week warning about “airport meltdowns” in the months to come.

The Club for Growth, a PAC supporting free-market solutions in the economy, took sides in the potential Democratic primary to replace U.S. Sen. Marco Rubio, R-Fla., in 2016, launching a new TV ad on Tuesday.

The new ad praises U.S. Rep. Alan Grayson, D-Fla., for opposing the Export-Import Bank, while hitting Murphy for supporting it. The new TV spot starts on MSNBC on Wednesday. Murphy launched a bid for the Senate back in March while Grayson has left the door open to entering the contest. 

Over the last century, American liberals have often supported a strong executive branch while conservatives have usually fought against giving additional power to the White House.