Analysis of the claim:
- Donald Trump did make a statement closely matching this claim, but it was specifically about President Obama in 2011-2012, not a general statement about the presidency. Trump said: "Our president will start a war with Iran because he has absolutely no ability to negotiate. He is weak and he is ineffective".
- Trump has used the phrase "weak and ineffective" to describe multiple others, including Senator John Cornyn ("Weak, ineffective, and very bad for the Republican Party"), judges and law enforcement officials ("WEAK and INEFFECTIVE Judges and Law Enforcement Officials"), and Republican leaders who rejected his efforts to overturn the 2020 election ("weak and ineffective" and the "Surrender Caucus").
- The claim as phrased lacks important context—it suggests Trump made a general statement that "the president is ineffective," but the actual quote was a specific criticism of President Obama's negotiating abilities regarding Iran in 2011-2012.
- There is no evidence Trump said this about himself or about the office of the presidency in general terms.
Conclusion: The claim contains a kernel of truth—Trump did call a sitting president "ineffective"—but it strips away critical context (that it was about Obama specifically, during 2011-2012). Without that context, the claim is misleading.
Overall validity: 40%