Bad news for government transparency: top politicians keep hiding serious health problems from voters, and Trump's own decline is now in the spotlight.

• Rubio flatly denied Trump falls asleep in meetings, even after being shown video of Trump dozing off during a cabinet meeting on Ukraine.
• Trump turns 79 this month, becoming the oldest president ever, and has a vein condition that can signal bigger hidden health issues.
• A New Jersey congressman, Tom Kean, has been missing for three months with no explanation, yet still won his primary while no one has seen him.
• Other cases show the pattern: a Texas congresswoman was secretly in memory care for a year, and several members died in office despite known illnesses.
• The bigger problem is the seniority system, which hands the most power to the oldest members and blocks younger people from rising.

Outlook: Pressure is growing, and a few older politicians are now stepping aside, but Congress still has no real health-disclosure rules.